Shareowner Return Performance Graph The following Performance Graph and related information shall not be deemed “soliciting material” or to be “filed” with the Securities and Exchange Commission, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or Securities Exchange Act of 1934, each as amended, except to the extent that the Company specifically incorporates it by reference into such filing.
The following graph shows a five-year comparison of cumulative total shareowners’ returns for our class B common stock, the S&P 500 Index, and the Dow Jones Transportation Average.
The comparison of the total cumulative return on investment, which is the change in the quarterly stock price plus reinvested dividends for each of the quarterly periods, assumes that $100 was invested on December 31, 2001 in the S&P 500 Index, the Dow Jones Transportation Average, and the class B common stock of United Parcel Service, Inc.
## Table 0 ##
Securities Authorized for Issuance under Equity Compensation Plans The following table provides information as of December 31, 2006 regarding compensation plans under which our Class A common stock is authorized for issuance.
These plans do not authorize the issuance of our Class B common stock.
estimates of the number of employees and eligible dependents covered under the plans, anticipated medical usage by participants and overall trends in medical costs and inflation.
Actual results may differ from these estimates and, therefore, produce a material difference between estimated and actual operating results.
Pension and Postretirement Medical Benefits—As discussed in Note 5 to our consolidated financial statements, we maintain several defined benefit and postretirement benefit plans.
Our pension and other postretirement benefit costs are calculated using various actuarial assumptions and methodologies as prescribed by Statement of Financial Accounting Standards No.87, “Employers’ Accounting for Pensions” and Statement of Financial Accounting Standards No.106, “Employers’ Accounting for Postretirement Benefits Other than Pensions.
” These assumptions include discount rates, health care cost trend rates, inflation, rate of compensation increases, expected return on plan assets, mortality rates, and other factors.
Actual results that differ from our assumptions are accumulated and amortized over future periods and, therefore, generally affect our recognized expense and recorded obligation in such future periods.
We believe that the assumptions utilized in recording the obligations under our plans are reasonable based on input from our outside actuaries and other advisors and information as to historical experience and performance.
Differences in actual experience or changes in assumptions may affect our pension and other postretirement obligations and future expense.
A 25 basis point change in the assumed discount rate, expected return on assets, and health care cost trend rate for the pension and postretirement benefit plans would result in the following increases (decreases) on the Company’s costs and obligations for the year 2006 (in millions)
## Table 1 ##
Financial Instruments—As discussed in Notes 2, 3, 8, and 15 to our consolidated financial statements, and in the “Market Risk” section of this report, we hold and issue financial instruments that contain elements of market risk.
Certain of these financial instruments are required to be recorded at fair value.
Fair values are based on listed market prices, when such prices are available.
To the extent that listed market prices are not available, fair value is determined based on other relevant factors, including dealer price quotations.
Certain financial instruments, including over-the-counter derivative instruments, are valued using pricing models that consider, among other factors, contractual and market prices, correlations, time value, credit spreads, and yield curve volatility factors.
Changes in the fixed income, equity, foreign exchange, and commodity markets will impact our estimates of fair value in the future, potentially affecting our results of operations.
A quantitative sensitivity analysis of our exposure to changes in commodity prices, foreign currency exchange rates, interest rates, and equity prices is presented in the “Market Risk” section of this report.
Depreciation, Residual Value, and Impairment of Fixed Assets—As of December 31, 2006, we had $16.779 billion of net fixed assets, the most significant category of which is aircraft.
In accounting for fixed assets, we
UNITED PARCEL SERVICE, INC.  AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) from stock options vesting subsequent to April 2004.
Activity in the deferred compensation program for the years ended December 31, 2006, 2005, and 2004 is as follows (in millions):
## Table 2 ##
NOTE 11.
STOCK-BASED COMPENSATION Incentive Compensation Plan The UPS Incentive Compensation Plan permits the grant of nonqualified stock options, incentive stock options, stock appreciation rights, restricted stock, performance shares, performance units, and management incentive awards to eligible employees.
The number of shares reserved for issuance under the Plan is 112 million, with the number of shares reserved for issuance as restricted stock limited to 34 million.
As of December 31, 2006, management incentive awards, stock options, restricted performance units, and restricted stock units had been granted under the Incentive Compensation Plan.
Management Incentive Awards & Restricted Stock Units Persons earning the right to receive management incentive awards are determined annually by the Compensation Committee of the UPS Board of Directors.
Our management incentive awards program provides that half of the annual management incentive award, with certain exceptions, be made in restricted stock units (“RSUs”), which generally vest over a five-year period.
The other half of the award is in the form of cash or unrestricted shares of class A common stock and is fully vested at the time of grant.
These management incentive awards are generally granted in the fourth quarter of each year.
Upon vesting, RSUs result in the issuance of the equivalent number of UPS class A common shares after required tax withholdings.
Except in the case of death, disability, or retirement, RSUs granted for our management incentive awards generally vest over a five year period with approximately 20% of the award vesting at each anniversary date of the grant.
The entire grant is expensed on a straight-line basis over the requisite service period.
All RSUs granted are subject to earlier cancellation or vesting under certain conditions.
Dividends earned on management incentive award RSUs are reinvested in additional RSUs at each dividend payable date.
We also award RSUs in conjunction with our long-term incentive performance awards program to certain eligible employees.
The RSUs ultimately granted under the long-term incentive performance award will be based upon the achievement of certain performance measures, including growth in consolidated revenue and operating return on invested capital, each year during the performance award cycle, and other measures, including growth in consolidated earnings, over the entire three year performance award cycle.

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td>12/31/01</td><td>12/31/02</td><td>12/31/03</td><td>12/31/04</td><td>12/31/05</td><td>12/31/06</td></tr><tr><td>United Parcel Service, Inc.</td><td>$100.00</td><td>$117.19</td><td>$140.49</td><td>$163.54</td><td>$146.35</td><td>$148.92</td></tr><tr><td>S&P 500 Index</td><td>$100.00</td><td>$77.90</td><td>$100.24</td><td>$111.15</td><td>$116.61</td><td>$135.02</td></tr><tr><td>Dow Jones Transportation Average</td><td>$100.00</td><td>$88.52</td><td>$116.70</td><td>$149.06</td><td>$166.42</td><td>$182.76</td></tr></table>
<table><tr><td></td><td>25 Basis Point Increase</td><td>25 Basis Point Decrease</td></tr><tr><td> Pension Plans</td><td></td><td></td></tr><tr><td><i>Discount Rate:</i></td><td></td><td></td></tr><tr><td>Effect on net periodic benefit cost</td><td>$-67</td><td>$68</td></tr><tr><td>Effect on projected benefit obligation</td><td>-571</td><td>595</td></tr><tr><td><i>Return on Assets:</i></td><td></td><td></td></tr><tr><td>Effect on net periodic benefit cost</td><td>-31</td><td>31</td></tr><tr><td> Postretirement Medical Plans</td><td></td><td></td></tr><tr><td><i>Discount Rate:</i></td><td></td><td></td></tr><tr><td>Effect on net periodic benefit cost</td><td>-7</td><td>7</td></tr><tr><td>Effect on projected benefit obligation</td><td>-83</td><td>86</td></tr><tr><td><i>Health Care Cost Trend Rate:</i></td><td></td><td></td></tr><tr><td>Effect on net periodic benefit cost</td><td>3</td><td>-2</td></tr><tr><td>Effect on projected benefit obligation</td><td>17</td><td>-16</td></tr></table>
<table><tr><td></td><td colspan="2">2006</td><td colspan="2">2005</td><td colspan="2">2004</td></tr><tr><td></td><td>Shares</td><td>Dollars</td><td>Shares</td><td>Dollars</td><td>Shares</td><td>Dollars</td></tr><tr><td> Deferred Compensation Obligations</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of year</td><td></td><td>$161</td><td></td><td>$169</td><td></td><td>$136</td></tr><tr><td>Reinvested dividends</td><td></td><td>4</td><td></td><td>4</td><td></td><td>2</td></tr><tr><td>Option exercise deferrals</td><td></td><td>—</td><td></td><td>—</td><td></td><td>39</td></tr><tr><td>Benefit payments</td><td></td><td>-18</td><td></td><td>-12</td><td></td><td>-8</td></tr><tr><td>Balance at end of year</td><td></td><td>$147</td><td></td><td>$161</td><td></td><td>$169</td></tr><tr><td> Treasury Stock</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of year</td><td>-3</td><td>$-161</td><td>-3</td><td>$-169</td><td>-2</td><td>$-136</td></tr><tr><td>Reinvested dividends</td><td>—</td><td>-4</td><td>—</td><td>-4</td><td>—</td><td>-2</td></tr><tr><td>Option exercise deferrals</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>-39</td></tr><tr><td>Benefit payments</td><td>—</td><td>18</td><td>—</td><td>12</td><td>-1</td><td>8</td></tr><tr><td>Balance at end of year</td><td>-3</td><td>$-147</td><td>-3</td><td>$-161</td><td>-3</td><td>$-169</td></tr></table>

Question: Which year is Dollars for Balance at end of year for Deferred Compensation Obligations the largest?
Answer: 2004