Principal Financial Group, Inc.  Notes to Consolidated Financial Statements — (continued) 5.
Variable Interest Entities — (continued) We have determined that this grantor trust is a VIE and that we are the primary beneficiary of the trust due to our interest in the VIE and management of the synthetic reference portfolios.
Upon consolidation of the trust, as of December 31, 2007 and 2006, our consolidated statements of financial position include $127.2 million and $130.3 million, respectively, of available-for-sale fixed maturity securities, which represent the collateral held by the trust.
As of December 31, 2007 and 2006, the credit default swap entered into by the trust has an outstanding notional amount of $130.0 million.
During the years ended December 31, 2007, 2006 and 2005, the credit default swaps had a change in fair value that resulted in a $3.2 million pre-tax loss, a $4.4 million pre-tax gain and $0.4 million pre-tax loss, respectively.
The creditors of the grantor trusts have no recourse to our assets.
Grantor Trusts.
We contributed undated subordinated floating rate notes to three grantor trusts.
The trusts separated the cash flows of the underlying notes by issuing an interest-only certificate and a residual certificate related to each note contributed.
Each interest-only certificate entitles the holder to interest on the stated note for a specified term while the residual certificate entitles the holder to interest payments subsequent to the term of the interest-only certificate and to all principal payments.
We retained the interest-only certificate and the residual certificates were subsequently sold to a third party.
We have determined that these grantor trusts are VIEs as our interest-only certificates are exposed to the majority of the risk of loss.
The restricted interest periods end between 2016 and 2020 and, at that time, the residual certificate holders’ certificates are redeemed by the trust in return for the notes.
We have determined that it will be necessary for us to consolidate these entities until the expiration of the interest-only period.
As of December 31, 2007 and 2006, our consolidated statements of financial position include $332.1 million and $366.2 million, respectively, of undated subordinated floating rate notes of the grantor trusts, which are classified as available-for-sale fixed maturity securities and represent the collateral held by the trust.
The obligation to deliver the underlying securities to the residual certificate holders of $155.6 million and $156.8 million as of December 31, 2007 and 2006, respectively, is classified as an other liability and contains an embedded derivative of the forecasted transaction to deliver the underlying securities.
The creditors of the grantor trusts have no recourse to our assets.
Other.
In addition to the entities above, we have a number of relationships with a disparate group of entities, which meet the criteria for VIEs.
Due to the nature of our direct investment in the equity and/or debt of these VIEs, we are the primary beneficiary of such entities, which requires us to consolidate them.
These entities include seven private investment vehicles, a financial services company and a hedge fund.
The consolidation of these VIEs did not have a material effect on either our consolidated statement of financial position as of December 31, 2007 or 2006, or results of operations for the years ended December 31, 2007, 2006 and 2005.
For the majority of these entities, the creditors have no recourse to our assets.
The carrying amount and classification of consolidated VIE assets that are collateral the VIEs have designated for their other obligations and the debt of the VIEs are as follows:
## Table 0 ##
As of December 31, 2007 and 2006, $334.8 million and $334.7 million, respectively, of assets were pledged as collateral for the VIE entities’ other obligations and debt.
As of December 31, 2007 and 2006, these entities had long-term debt of $175.6 million and $206.4 million, respectively, all of which was issued to our affiliates and, therefore, eliminated upon consolidation.
Principal Financial Group, Inc.  Notes to Consolidated Financial Statements — (continued) 6.
Investments — (continued) Other Investments Other investments include minority interests in unconsolidated entities, domestic and international joint ventures and partnerships and properties owned jointly with venture partners and operated by the partners.
Such investments are generally accounted for using the equity method.
In applying the equity method, we record our share of income or loss reported by the equity investees.
Changes in the value of our investment in equity investees attributable to capital transactions of the investee, such as an additional offering of stock, are recorded directly to stockholders’ equity.
Total assets of the unconsolidated entities were $17,290.8 million and $12,010.2 million at December 31, 2007 and 2006, respectively.
Total revenues of the unconsolidated entities were $3,382.1 million, $2,174.1 million and $1,785.6 million in 2007, 2006, and 2005, respectively.
During 2007, 2006, and 2005, we included $106.1 million, $94.3 million and $89.3 million, respectively, in net investment income representing our share of current year net income of the unconsolidated entities.
At December 31, 2007 and 2006, our net investment in unconsolidated entities was $604.9 million and $387.0 million, respectively.
In the ordinary course of our business and as part of our investment operations, we have also entered into long term contracts to make and purchase investments aggregating $402.2 million and $677.2 million at December 31, 2007 and 2006, respectively.
Derivative assets are carried at fair value and reported as a component of other investments.
Certain seed money investments are carried at fair value with changes in fair value included in net income as net realized/unrealized capital gains or losses.7.
Securitization Transactions We, along with other contributors, sell commercial mortgage loans in securitization transactions to trusts.
As these trusts are classified as a QSPE, they are not subject to the VIE consolidation rules.
We purchase primary servicing responsibilities and may retain other interests.
The investors and the securitization entities have no recourse to our other assets for failure of debtors to pay when due.
The value of our retained interests is subject primarily to credit risk.
In 2006, we began transitioning our securitization platform to a new joint venture company that we report using the equity method of accounting.
The transition was complete by the end of 2007 such that all of our commercial mortgage loan securitization transactions going forward are expected to be conducted through the joint venture.
In 2007, 2006, and 2005, we recognized gains of $2.2 million, $13.6 million and $39.8 million, respectively, on the securitization of commercial mortgage loans.
Key economic assumptions used in measuring the other retained interests at the date of securitization resulting from transactions completed included a cumulative foreclosure rate between 1% and 7% during 2007, 2% and 10% during 2006, and 5% and 18% during 2005.
The assumed range of the loss severity, as a percentage of defaulted loans, was between 1% and 27% during 2007, 2% and 31% during 2006, and 3% and 29% during 2005.
The low end of the loss severity range relates to a portfolio of seasoned loans.
The high end of the loss severity range relates to a portfolio of newly issued loans.
At December 31, 2007 and 2006, the fair values of other retained interests related to the securitizations of commercial mortgage loans were $315.8 million and $345.3 million, respectively.
Only $0.3 million in 2007 and $0.5 million in 2006 represented equity investments.
All other interests are classified as available-for-sale securities and are carried at fair value.
At December 31, 2007 and 2006, respectively, $131.7 million and $156.2 million of these available-for-sale securities were interest-only investments.
Cash flows are continuously monitored for adverse deviations from original expectations and impairments are recorded when necessary.
The table below summarizes cash flows for securitization transactions:
## Table 1 ##
U. S.  Invested Assets Unrealized Losses on Investment Grade Fixed Maturity Securities Available-for-Sale by Aging Category
## Table 2 ##
U. S.  Invested Assets Unrealized Losses on Below Investment Grade Fixed Maturity Securities Available-for-Sale by Aging Category
## Table 3 ##
U. S.  Invested Assets Unrealized Losses on Below Investment Grade Fixed Maturity Securities Available-for-Sale by Aging Category
## Table 4 ##
Of total gross unrealized losses as of December 31, 2007 and 2006, $1,073.8 million and $288.8 million were related to investment grade securities, respectively.
Gross unrealized losses related to below investment grade securities were $94.4 million and $11.1 million as of December 31, 2007 and 2006, respectively
The environmental liability includes costs for remediation and restoration of sites, as well as for ongoing monitoring costs, but excludes any anticipated recoveries from third parties.
Cost estimates are based on information available for each site, financial viability of other potentially responsible parties, and existing technology, laws, and regulations.
We believe that we have adequately accrued for our ultimate share of costs at sites subject to joint and several liability.
However, the ultimate liability for remediation is difficult to determine because of the number of potentially responsible parties involved, site-specific cost sharing arrangements with other potentially responsible parties, the degree of contamination by various wastes, the scarcity and quality of volumetric data related to many of the sites, and the speculative nature of remediation costs.
Estimates may also vary due to changes in federal, state, and local laws governing environmental remediation.
We do not expect current obligations to have a material adverse effect on our results of operations or financial condition.
Guarantees – At December 31, 2006, we were contingently liable for $464 million in guarantees.
We have recorded a liability of $6 million for the fair value of these obligations as of December 31, 2006.
We entered into these contingent guarantees in the normal course of business, and they include guaranteed obligations related to our headquarters building, equipment financings, and affiliated operations.
The final guarantee expires in 2022.
We are not aware of any existing event of default that would require us to satisfy these guarantees.
We do not expect that these guarantees will have a material adverse effect on our consolidated financial condition, results of operations, or liquidity.
Indemnities – Our maximum potential exposure under indemnification arrangements, including certain tax indemnifications, can range from a specified dollar amount to an unlimited amount, depending on the nature of the transactions and the agreements.
Due to uncertainty as to whether claims will be made or how they will be resolved, we cannot reasonably determine the probability of an adverse claim or reasonably estimate any adverse liability or the total maximum exposure under these indemnification arrangements.
We do not have any reason to believe that we will be required to make any material payments under these indemnity provisions.
Income Taxes – As previously reported in our Form 10-Q for the quarter ended September 30, 2005, the IRS has completed its examinations and issued notices of deficiency for tax years 1995 through 2002.
Among their proposed adjustments is the disallowance of tax deductions claimed in connection with certain donations of property.
In the fourth quarter of 2005, the IRS National Office issued a Technical Advice Memorandum which left unresolved whether the deductions were proper, pending further factual development.
We continue to dispute the donation issue, as well as many of the other proposed adjustments, and will contest the associated tax deficiencies through the IRS Appeals process, and, if necessary, litigation.
In addition, the IRS is examining the Corporation’s federal income tax returns for tax years 2003 and 2004 and should complete their exam in 2007.
We do not expect that the ultimate resolution of these examinations will have a material adverse effect on our Consolidated Financial Statements.11.
Other Income Other income included the following for the years ended December 31:
## Table 5 ##

<table><tr><td> </td><td colspan="2"> December 31,</td></tr><tr><td> </td><td> 2007</td><td> 2006</td></tr><tr><td> </td><td colspan="2"><i>(in millions)</i>  </td></tr><tr><td>Fixed maturity securities, available-for-sale</td><td>$116.2</td><td>$178.0</td></tr><tr><td>Fixed maturity securities, trading</td><td>34.7</td><td>14.0</td></tr><tr><td>Equity securities, trading</td><td>90.1</td><td>59.5</td></tr><tr><td>Cash and other assets</td><td>93.8</td><td>83.2</td></tr><tr><td>Total assets pledged as collateral</td><td>$334.8</td><td>$334.7</td></tr><tr><td>Long-term debt</td><td>$175.6</td><td>$206.4</td></tr></table>
<table><tr><td> </td><td colspan="3"> For the year ended December 31,</td></tr><tr><td> </td><td> 2007</td><td> 2006</td><td> 2005</td></tr><tr><td> </td><td colspan="3"><i>(in millions) </i> </td></tr><tr><td>Proceeds from new securitizations</td><td>$105.2</td><td>$698.6</td><td>$2,270.4</td></tr><tr><td>Servicing fees received</td><td>1.9</td><td>1.3</td><td>1.1</td></tr><tr><td>Other cash flows received on retained interests</td><td>35.7</td><td>37.4</td><td>36.0</td></tr></table>
<table><tr><td> </td><td colspan="6"> December 31, 2006</td></tr><tr><td> </td><td colspan="2"> Public</td><td colspan="2"> Private</td><td colspan="2"> Total</td></tr><tr><td> </td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td></tr><tr><td> </td><td colspan="6"><i>(in millions) </i> </td></tr><tr><td>Three months or less</td><td>$2,730.4</td><td>$17.6</td><td>$1,471.2</td><td>$9.1</td><td>$4,201.6</td><td>$26.7</td></tr><tr><td>Greater than three to six months</td><td>30.3</td><td>0.4</td><td>22.7</td><td>0.3</td><td>53.0</td><td>0.7</td></tr><tr><td>Greater than six to nine months</td><td>224.8</td><td>1.6</td><td>107.1</td><td>1.3</td><td>331.9</td><td>2.9</td></tr><tr><td>Greater than nine to twelve months</td><td>1,502.6</td><td>28.2</td><td>549.9</td><td>8.2</td><td>2,052.5</td><td>36.4</td></tr><tr><td>Greater than twelve to twenty-four months</td><td>5,688.9</td><td>126.0</td><td>1,938.1</td><td>52.2</td><td>7,627.0</td><td>178.2</td></tr><tr><td>Greater than twenty-four to thirty-six months</td><td>843.4</td><td>22.9</td><td>365.5</td><td>10.2</td><td>1,208.9</td><td>33.1</td></tr><tr><td>Greater than thirty-six months</td><td>101.5</td><td>4.8</td><td>113.9</td><td>6.0</td><td>215.4</td><td>10.8</td></tr><tr><td>Total fixed maturities, available-for-sale</td><td>$11,121.9</td><td>$201.5</td><td>$4,568.4</td><td>$87.3</td><td>$15,690.3</td><td>$288.8</td></tr></table>
<table><tr><td> </td><td colspan="6"> December 31, 2007</td></tr><tr><td> </td><td colspan="2"> Public</td><td colspan="2"> Private</td><td colspan="2"> Total</td></tr><tr><td> </td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td></tr><tr><td> </td><td colspan="6"><i>(in millions) </i> </td></tr><tr><td>Three months or less</td><td>$95.4</td><td>$4.0</td><td>$187.0</td><td>$5.5</td><td>$282.4</td><td>$9.5</td></tr><tr><td>Greater than three to six months</td><td>62.8</td><td>2.6</td><td>115.6</td><td>5.4</td><td>178.4</td><td>8.0</td></tr><tr><td>Greater than six to nine months</td><td>130.5</td><td>22.8</td><td>91.3</td><td>3.0</td><td>221.8</td><td>25.8</td></tr><tr><td>Greater than nine to twelve months</td><td>91.5</td><td>11.3</td><td>17.3</td><td>0.7</td><td>108.8</td><td>12.0</td></tr><tr><td>Greater than twelve to twenty-four months</td><td>57.0</td><td>11.1</td><td>21.7</td><td>13.0</td><td>78.7</td><td>24.1</td></tr><tr><td>Greater than twenty-four to thirty-six months</td><td>138.3</td><td>11.4</td><td>72.9</td><td>2.1</td><td>211.2</td><td>13.5</td></tr><tr><td>Greater than thirty-six months</td><td>16.5</td><td>0.6</td><td>26.6</td><td>0.9</td><td>43.1</td><td>1.5</td></tr><tr><td>Total fixed maturities, available-for-sale</td><td>$592.0</td><td>$63.8</td><td>$532.4</td><td>$30.6</td><td>$1,124.4</td><td>$94.4</td></tr></table>
<table><tr><td> </td><td colspan="6"> December 31, 2006</td></tr><tr><td> </td><td colspan="2"> Public</td><td colspan="2"> Private</td><td colspan="2"> Total</td></tr><tr><td> </td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td><td> Carrying amount</td><td> Gross unrealized losses</td></tr><tr><td> </td><td colspan="6"><i>(in millions) </i> </td></tr><tr><td>Three months or less</td><td>$64.0</td><td>$0.2</td><td>$83.5</td><td>$0.5</td><td>$147.5</td><td>$0.7</td></tr><tr><td>Greater than three to six months</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Greater than six to nine months</td><td>38.7</td><td>1.0</td><td>—</td><td>—</td><td>38.7</td><td>1.0</td></tr><tr><td>Greater than nine to twelve months</td><td>56.6</td><td>1.3</td><td>—</td><td>—</td><td>56.6</td><td>1.3</td></tr><tr><td>Greater than twelve to twenty-four months</td><td>152.8</td><td>3.5</td><td>117.8</td><td>3.0</td><td>270.6</td><td>6.5</td></tr><tr><td>Greater than twenty-four to thirty-six months</td><td>—</td><td>—</td><td>27.3</td><td>1.5</td><td>27.3</td><td>1.5</td></tr><tr><td>Greater than thirty-six months</td><td>—</td><td>—</td><td>0.6</td><td>0.1</td><td>0.6</td><td>0.1</td></tr><tr><td>Total fixed maturities, available-for-sale</td><td>$312.1</td><td>$6.0</td><td>$229.2</td><td>$5.1</td><td>$541.3</td><td>$11.1</td></tr></table>
<table><tr><td><i>Millions of Dollars</i></td><td>2006</td><td>2005</td><td>2004</td></tr><tr><td>Rental income</td><td>$83</td><td>$59</td><td>$55</td></tr><tr><td>Net gain on non-operating asset dispositions</td><td>72</td><td>135</td><td>69</td></tr><tr><td>Interest income</td><td>29</td><td>17</td><td>10</td></tr><tr><td>Sale of receivables fees</td><td>-33</td><td>-23</td><td>-11</td></tr><tr><td>Non-operating environmental costs and other</td><td>-33</td><td>-43</td><td>-35</td></tr><tr><td>Total</td><td>$118</td><td>$145</td><td>$88</td></tr></table>

Question: what was the percentage change in rental income from 2004 to 2005?
Answer: 0.07273