Air Mobility sales declined by $535 million primarily due to C-130J deliveries (12 in 2006 compared to 15 in 2005) and lower volume on the C-5 program.
Combat Aircraft sales increased by $292 million mainly due to higher F-35 and F-22 volume, partially offset by reduced volume on F-16 programs.
Other Aeronautics programs sales increased by $83 million primarily due to higher volume in sustainment services activities.
Operating profit for the segment increased 21% in 2007 compared to 2006.
Operating profit increases in Combat Aircraft more than offset decreases in Other Aeronautics programs and Air Mobility.
Combat Aircraft operating profit increased $326 million mainly due to improved performance on F-22 and F-16 programs.
Air Mobility and Other Aeronautics programs declined $77 million due to lower operating profit in support and sustainment activities.
Operating profit for the segment increased 20% in 2006 compared to 2005.
Operating profit increased in both Combat Aircraft and Air Mobility.
Combat Aircraft increased $114 million, mainly due to higher volume on the F-35 and F-22 programs, and improved performance on F-16 programs.
The improvement for the year was also attributable in part to the fact that in 2005, operating profit included a reduction in earnings on the F-35 program.
Air Mobility operating profit increased $84 million, mainly due to improved performance on C-130J sustainment activities in 2006.
Backlog decreased in 2007 as compared to 2006 primarily as a result of sales volume on the F-35 program.
This decrease was offset partially by increased orders on the F-22 and C-130J programs.
Electronic Systems Electronic Systems’ operating results included the following:
## Table 0 ##
Net sales for Electronic Systems increased by 6% in 2007 compared to 2006.
Sales increased in Missiles & Fire Control (M&FC), Maritime Systems & Sensors (MS2), and Platform, Training & Energy (PT&E).
M&FC sales increased $258 million mainly due to higher volume in fire control systems and air defense programs, which more than offset declines in tactical missile programs.
MS2 sales grew $254 million due to volume increases in undersea and radar systems activities that were offset partially by decreases in surface systems activities.
PT&E sales increased $113 million, primarily due to higher volume in platform integration activities, which more than offset declines in distribution technology activities.
Net sales for Electronic Systems increased by 7% in 2006 compared to 2005.
Higher volume in platform integration activities led to increased sales of $329 million at PT&E.
MS2 sales increased $267 million primarily due to surface systems activities.
Air defense programs contributed to increased sales of $118 million at M&FC.
Operating profit for the segment increased by 12% in 2007 compared to 2006, representing an increase in all three lines of business during the year.
Operating profit increased $70 million at PT&E primarily due to higher volume and improved performance on platform integration activities.
MS2 operating profit increased $32 million due to higher volume on undersea and tactical systems activities that more than offset lower volume on surface systems activities.
At M&FC, operating profit increased $32 million due to higher volume in fire control systems and improved performance in tactical missile programs, which partially were offset by performance on certain international air defense programs in 2006.
Operating profit for the segment increased by 17% in 2006 compared to 2005.
Operating profit increased by $74 million at MS2 mainly due to higher volume on surface systems and undersea programs.
PT&E operating profit increased $61 million mainly due to improved performance on distribution technology activities.
Higher volume on air defense programs contributed to a $52 million increase in operating profit at M&FC.
The increase in backlog during 2007 over 2006 resulted primarily from increased orders for certain tactical missile programs and fire control systems at M&FC and platform integration programs at PT&E.
PRUDENTIAL FINANCIAL, INC.  Notes to Consolidated Financial Statements 4.
INVESTMENTS (continued) (1) Includes credit tranched securities collateralized by auto loans, credit cards, education loans, and other asset types.
(2) Includes publicly traded agency pass-through securities and collateralized mortgage obligations.
(3) Represents the amount of other-than-temporary impairment losses in “Accumulated other comprehensive income (loss),” or “AOCI,” which were not included in earnings.
## Table 1 ##
(1) Includes credit tranched securities collateralized by sub-prime mortgages, auto loans, credit cards, education loans, and other asset types.
(2) Includes publicly traded agency pass-through securities and collateralized mortgage obligations.
(3) Represents the amount of other-than-temporary impairment losses in “Accumulated other comprehensive income (loss),” or “AOCI,” which were not included in earnings.
Amount excludes $540 million of net unrealized gains on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date.
(4) Includes reclassifications to conform to current period presentation.
## Table 2 ##
(1) Includes credit tranched securities collateralized by auto loans, credit cards, education loans, and other asset types.
(2) Includes publicly traded agency pass-through securities and collateralized mortgage obligations.
(3) Represents the amount of other-than-temporary impairment losses in “Accumulated other comprehensive income (loss),” or “AOCI,” which were not included in earnings.
The amortized cost and fair value of fixed maturities by contractual maturities at December 31, 2010, are as follows:
## Table 3 ##
Our income tax provision amounted to an income tax expense of $1,310 million in 2010 compared to a benefit of $54 million in 2009.
The increase in income tax expense primarily reflects the increase in pre-tax income from continuing operations before income taxes and equity in earnings of operating joint ventures for the year ended December 31, 2010.
In addition, the 2009 income tax benefit included a reduction to the liability for unrecognized tax benefits and related interest of $272 million primarily related to tax years prior to 2002 as a result of the expiration of the statute of limitations for the 2002 and 2003 tax years, additional interest on a tax refund received related to the 1997 through 2001 tax years, and changes in estimates.
In addition, 2010 income tax expense includes a charge for the reduction of deferred tax assets in the amount of $94 million related to the Medicare Part D subsidy and a charge of $29 million to reflect an increase in valuation allowance related to deferred tax assets established in 2010 and prior years.
The change in valuation allowance in the current year reflects the Company’s reassessment of the likelihood of the realization of state and local deferred tax assets for certain non-insurance subsidiaries.
We employ various tax strategies, including strategies to minimize the amount of taxes resulting from realized capital gains.
For additional information regarding income taxes, see Note 19 to the Consolidated Financial Statements.
Discontinued Operations Included within net income are the results of businesses which are reflected as discontinued operations under U. S.  GAAP.
Income (loss) from discontinued operations, net of taxes, was $10 million, $(39) million and $75 million for the years ended December 31, 2010, 2009 and 2008, respectively.
For additional information regarding discontinued operations see Note 3 to the Consolidated Financial Statements.
Divested Businesses Our income from continuing operations includes results from several businesses that have been or will be sold or exited that do not qualify for “discontinued operations” accounting treatment under U. S.  GAAP.
The results of these divested businesses are reflected in our Corporate and Other operations, but excluded from adjusted operating income.
A summary of the results of these divested businesses that have been excluded from adjusted operating income is as follows for the periods indicated:

Tables referenced above, in order (Table 0 first):
<table><tr><td><i>(In millions)</i></td><td><i>2007</i></td><td><i>2006</i></td><td><i>2005</i></td></tr><tr><td>Net sales</td><td>$11,143</td><td>$10,519</td><td>$9,811</td></tr><tr><td>Operating profit</td><td>1,410</td><td>1,264</td><td>1,078</td></tr><tr><td>Backlog at year-end</td><td>21,200</td><td>19,700</td><td>18,600</td></tr></table>
<table><tr><td></td><td colspan="5">2009</td></tr><tr><td></td><td> Amortized Cost</td><td> Gross Unrealized Gains</td><td> Gross Unrealized Losses</td><td> Fair Value</td><td>Other-than- temporary Impairments in AOCI-3</td></tr><tr><td></td><td colspan="5">(in millions)</td></tr><tr><td> Fixed maturities, available for sale</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury securities and obligations of U.S. government authorities and agencies</td><td>$8,254</td><td>$384</td><td>$370</td><td>$8,268</td><td>$0</td></tr><tr><td>Obligations of U.S. states and their political subdivisions</td><td>1,389</td><td>28</td><td>42</td><td>1,375</td><td>0</td></tr><tr><td>Foreign government bonds-4</td><td>40,627</td><td>1,569</td><td>142</td><td>42,054</td><td>0</td></tr><tr><td>Corporate securities-4</td><td>89,083</td><td>4,357</td><td>2,739</td><td>90,701</td><td>-43</td></tr><tr><td>Asset-backed securities-1</td><td>12,587</td><td>155</td><td>2,504</td><td>10,238</td><td>-1,716</td></tr><tr><td>Commercial mortgage-backed securities</td><td>11,036</td><td>202</td><td>220</td><td>11,018</td><td>1</td></tr><tr><td>Residential mortgage-backed securities-2</td><td>11,275</td><td>428</td><td>132</td><td>11,571</td><td>-11</td></tr><tr><td>Total fixed maturities, available for sale</td><td>$174,251</td><td>$7,123</td><td>$6,149</td><td>$175,225</td><td>$-1,769</td></tr><tr><td> Equity securities, available for sale</td><td>$6,106</td><td>$1,014</td><td>$225</td><td>$6,895</td><td></td></tr></table>
<table><tr><td></td><td colspan="5"> 2009</td></tr><tr><td></td><td> Amortized Cost</td><td> Gross Unrealized Gains</td><td> Gross Unrealized Losses</td><td> Fair Value</td><td> Other-than- temporary Impairments in AOCI-3</td></tr><tr><td></td><td colspan="5"> (in millions)</td></tr><tr><td> Fixed maturities, held to maturity</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Foreign government bonds</td><td>$1,058</td><td>$25</td><td>$1</td><td>$1,082</td><td>$0</td></tr><tr><td>Corporate securities</td><td>876</td><td>1</td><td>126</td><td>751</td><td>0</td></tr><tr><td>Asset-backed securities-1</td><td>1,112</td><td>16</td><td>3</td><td>1,125</td><td>0</td></tr><tr><td>Commercial mortgage-backed securities</td><td>460</td><td>104</td><td>0</td><td>564</td><td>0</td></tr><tr><td>Residential mortgage-backed securities-2</td><td>1,614</td><td>65</td><td>3</td><td>1,676</td><td>0</td></tr><tr><td>Total fixed maturities, held to maturity</td><td>$5,120</td><td>$211</td><td>$133</td><td>$5,198</td><td>$0</td></tr></table>
<table><tr><td></td><td colspan="2"> Available for Sale</td><td colspan="2"> Held to Maturity</td></tr><tr><td></td><td> Amortized Cost</td><td> Fair Value</td><td> Amortized Cost</td><td> Fair Value</td></tr><tr><td></td><td colspan="4"> (in millions)</td></tr><tr><td>Due in one year or less</td><td>$6,401</td><td>$6,459</td><td>$0</td><td>$0</td></tr><tr><td>Due after one year through five years</td><td>36,171</td><td>37,497</td><td>0</td><td>0</td></tr><tr><td>Due after five years through ten years</td><td>37,292</td><td>39,320</td><td>256</td><td>262</td></tr><tr><td>Due after ten years</td><td>74,437</td><td>78,709</td><td>2,002</td><td>2,025</td></tr><tr><td>Asset-backed securities</td><td>12,459</td><td>10,991</td><td>1,179</td><td>1,226</td></tr><tr><td>Commercial mortgage-backed securities</td><td>11,443</td><td>12,037</td><td>475</td><td>581</td></tr><tr><td>Residential mortgage-backed securities</td><td>9,551</td><td>9,970</td><td>1,314</td><td>1,383</td></tr><tr><td>Total</td><td>$187,754</td><td>$194,983</td><td>$5,226</td><td>$5,477</td></tr></table>

Question: what was the percentage change in backlog from 2006 to 2007?
Answer: 0.07614
Reasoning program: subtract(21200,19700), divide(#0,19700)