Notes to Consolidated Financial Statements — (Continued) Becton, Dickinson and Company Note 9 — Benefit Plans The Company has defined benefit pension plans covering certain employees in the United States and certain international locations.
Postretirement healthcare and life insurance benefits provided to qualifying domestic retirees as well as other postretirement benefit plans in international countries are not material.
The measurement date used for the Company’s employee benefit plans is September 30.
Effective January 1, 2018, the legacy U. S.  pension plan was frozen to limit the participation of employees who are hired or re-hired by the Company, or who transfer employment to the Company, on or after January 1, 2018.
Net pension cost for the years ended September 30 included the following components:
## Table 0 ##
The amounts provided above for amortization of prior service credit and amortization of loss represent the reclassifications of prior service credits and net actuarial losses that were recognized in Accumulated other comprehensive income (loss) in prior periods.
The settlement losses recorded in 2019 and 2018 primarily included lump sum benefit payments associated with the Company’s U. S.  supplemental pension plan.
The Company recognizes pension settlements when payments from the supplemental plan exceed the sum of service and interest cost components of net periodic pension cost associated with this plan for the fiscal year.
As further discussed in Note 2, upon adopting an accounting standard update on October 1, 2018, all components of the Company’s net periodic pension and postretirement benefit costs, aside from service cost, are recorded to Other income (expense), net on its consolidated statements of income, for all periods presented.
The reconciliations to the most comparable measurements, in accordance with accounting principles generally accepted in the U. S. , for the numerator and denominator of the one-year and three-year ROIIC are as follows:
## Table 1 ##
(1) Represents depreciation and amortization from continuing operations.
(2) Represents the effect of foreign currency translation by translating results at an average exchange rate for the periods measured.
(3) Represents one-year weighted-average adjusted cash used for investing activities, determined by applying the weightings below to the adjusted cash used for investing activities for each quarter in the two-year period ended December 31, 2008.
## Table 2 ##
Three-year ROIIC calculation
## Table 3 ##
(4) Represents depreciation and amortization from continuing operations.
(5) Represents the effect of foreign currency translation by translating results at an average exchange rate for the periods measured.
(6) Represents three-year weighted-average adjusted cash used for investing activities, determined by applying the weightings below to the adjusted cash used for investing activities for each quarter in the four-year period ended December 31, 2008.
Risk factors and cautionary statement about forward-looking information This report includes forward-looking statements about our plans and future performance, including those under Outlook for 2009.
These statements use such words as “may,” “will,” “expect,” “believe” and “plan.
” They reflect our expectations and speak only as of the date of this report.
We do not undertake to update them.
Our expectations (or the underlying assumptions) may change or not be realized, and you should not rely unduly on forward-looking statements.
We have identified the principal risks and uncertainties that affect our performance in the Company’s filings with the Securities and Exchange Commission, and investors are urged to consider these risks and uncertainties when evaluating our historical and expected performance.
Property and equipment Property and equipment are stated at cost, with depreciation and amortization provided using the straight-line method over the following estimated useful lives: buildings–up to 40 years; leasehold improvements–the lesser of useful lives of assets or lease terms, which generally include option periods; and equipment–three to 12 years.
Goodwill Goodwill represents the excess of cost over the net tangible assets and identifiable intangible assets of acquired restaurant businesses.
The Company’s goodwill primarily results from purchases of McDonald’s restaurants from franchisees and ownership increases in international subsidiaries or affiliates, and it is generally assigned to the reporting unit expected to benefit from the synergies of the combination.
If a Company-operated restaurant is sold within 24 months of acquisition, the goodwill associated with the acquisition is written off in its entirety.
If a restaurant is sold beyond 24 months from the acquisition, the amount of goodwill written off is based on the relative fair value of the business sold compared to the portion of the reporting unit (defined as each individual country).
In accordance with Statement of Financial Accounting Standards No.142, Goodwill and Intangible Assets, the annual goodwill impairment test, conducted in the fourth quarter, compares the fair value of a reporting unit, generally based on discounted future cash flows, with its carrying amount including goodwill.
If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is measured as the difference between the implied fair value of the reporting unit’s goodwill and the carrying amount of goodwill.
The following table presents the 2008 activity in goodwill by segment:

<table><tr><td></td><td>Pension Plans</td></tr><tr><td>(Millions of dollars)</td><td>2019</td><td>2018</td><td>2017</td></tr><tr><td>Service cost</td><td>$134</td><td>$136</td><td>$110</td></tr><tr><td>Interest cost</td><td>107</td><td>90</td><td>61</td></tr><tr><td>Expected return on plan assets</td><td>- 180</td><td>- 154</td><td>- 112</td></tr><tr><td>Amortization of prior service credit</td><td>- 13</td><td>- 13</td><td>- 14</td></tr><tr><td>Amortization of loss</td><td>78</td><td>78</td><td>92</td></tr><tr><td>Settlements</td><td>10</td><td>2</td><td>—</td></tr><tr><td>Net pension cost</td><td>$135</td><td>$137</td><td>$138</td></tr><tr><td>Net pension cost included in the preceding table that is attributable to international plans</td><td>$32</td><td>$34</td><td>$43</td></tr></table>
<table><tr><td colspan="2"><i>Years ended December 31,</i>  <i>2008</i> <i></i></td><td><i>2007</i></td><td>Incremental change</td></tr><tr><td>NUMERATOR:</td><td></td><td></td><td></td></tr><tr><td>Operating income</td><td>$6,442.9</td><td>$3,879.0</td><td>$2,563.9</td></tr><tr><td>Depreciation and amortization<i><sup>-1</sup></i></td><td>1,207.8</td><td>1,192.8</td><td>15.0</td></tr><tr><td>Latam transaction</td><td></td><td>1,665.3</td><td>-1,665.3</td></tr><tr><td>Currency translation<i><sup>-2</sup></i></td><td></td><td></td><td>-180.7</td></tr><tr><td colspan="3"> Incremental adjusted operating income plus depreciation and amortization(at constant foreign exchange rates)</td><td>$732.9</td></tr><tr><td>DENOMINATOR:</td><td></td><td></td><td></td></tr><tr><td colspan="3">Weighted-average adjusted cash used for investing activities<i><sup>-3</sup></i></td><td>$1,911.9</td></tr><tr><td>Currency translation<i><sup>-2</sup></i></td><td></td><td></td><td>-25.9</td></tr><tr><td colspan="3"> Weighted-average adjusted cash used for investing activities (at constant foreign exchange rates)</td><td>$1,886.0</td></tr><tr><td> One-year ROIIC</td><td></td><td></td><td>38.9%</td></tr></table>
<table><tr><td></td><td colspan="4">Years ended December 31,</td></tr><tr><td></td><td>2005</td><td>2006</td><td>2007</td><td>2008</td></tr><tr><td><i>Cash used for investing activities</i></td><td>$1,817.8</td><td>$1,274.1</td><td>$1,150.1</td><td>$1,624.7</td></tr><tr><td><i>Less: Cash (generated from) used for investing activities related to Boston Market & Chipotle</i></td><td>109.0</td><td>-203.8</td><td>-184.3</td><td></td></tr><tr><td><i>Less: Cash generated from investing activities related to Latam transaction</i></td><td></td><td></td><td>-647.5</td><td></td></tr><tr><td><i>Less: Cash generated from investing activities related to Pret A Manger transaction</i></td><td></td><td></td><td></td><td>-229.4</td></tr><tr><td><i>Adjusted cash used for investing activities</i></td><td>$1,708.8</td><td>$1,477.9</td><td>$1,981.9</td><td>$1,854.1</td></tr><tr><td><i>AS A PERCENT</i></td><td></td><td></td><td></td><td></td></tr><tr><td><i>Quarters ended:</i></td><td></td><td></td><td></td><td></td></tr><tr><td><i>March 31</i></td><td>12.5%</td><td>100.0%</td><td>100.0%</td><td>87.5%</td></tr><tr><td><i>June 30</i></td><td>37.5</td><td>100.0</td><td>100.0</td><td>62.5</td></tr><tr><td><i>September 30</i></td><td>62.5</td><td>100.0</td><td>100.0</td><td>37.5</td></tr><tr><td><i>December 31</i></td><td>87.5</td><td>100.0</td><td>100.0</td><td>12.5</td></tr></table>
<table><tr><td colspan="2"><i>Years ended December 31,</i> <i>2008</i><i></i></td><td><i>2005</i></td><td>Incremental change</td></tr><tr><td>NUMERATOR:</td><td></td><td></td><td></td></tr><tr><td>Operating income</td><td>$6,442.9</td><td>$3,984.0</td><td>$2,458.9</td></tr><tr><td>Depreciation and amortization<i><sup>-4</sup></i></td><td>1,207.8</td><td>1,187.6</td><td>20.2</td></tr><tr><td>Currency translation<i><sup>-5</sup></i></td><td></td><td></td><td>-508.3</td></tr><tr><td colspan="3"> Incremental adjusted operating income plus depreciation and amortization(at constant foreign exchange rates)</td><td>$1,970.8</td></tr><tr><td>DENOMINATOR:</td><td></td><td></td><td></td></tr><tr><td colspan="3">Weighted-average adjusted cash used for investing activities<i><sup>-6</sup></i></td><td>$5,267.5</td></tr><tr><td>Currency translation<i><sup>-5</sup></i></td><td></td><td></td><td>-14.0</td></tr><tr><td colspan="3"> Weighted-average adjusted cash used for investing activities (at constant foreign exchange rates)</td><td>$5,253.5</td></tr><tr><td> Three-year ROIIC</td><td></td><td></td><td>37.5%</td></tr></table>

Question: What's the average of Operating income of 2005, and Operating income of 2007 ?
Answer: 3931.5