The following is a summary of stock-based performance award and restricted stock award activity.
## Table 0 ##
(a) Additional shares were issued in 2006 and 2007 because the performance targets were exceeded for the 36-month performance periods related to the 2003 and 2004 grants.
During 2007, 2006 and 2005 the weighted average grant date fair value of restricted stock awards was $54.97, $40.45 and $27.21.
The vesting date fair value of stock-based performance awards which vested during 2007, 2006 and 2005 was $38 million, $21 million and $5 million.
The vesting date fair value of restricted stock awards which vested during 2007, 2006 and 2005 was $29 million, $32 million and $13 million.
As of December 31, 2007, there was $37 million of unrecognized compensation cost related to restricted stock awards which is expected to be recognized over a weighted average period of 1.4 year.25.
Stockholders’ Equity Common stock – On April 25, 2007, Marathon’s stockholders approved an increase in the number of authorized shares of common stock from 550 million to 1.1 billion shares, and the Company’s Board of Directors subsequently declared a two-for-one split of the Company’s common stock.
The stock split was effected in the form of a stock dividend distributed on June 18, 2007, to stockholders of record at the close of business on May 23, 2007.
Stockholders received one additional share of Marathon Oil Corporation common stock for each share of common stock held as of the close of business on the record date.
In addition, shares of common stock issued or issuable for stock-based awards under Marathon’s incentive compensation plans were proportionately increased in accordance with the terms of the plans.
Common stock and per share (except par value) information for all periods presented has been restated in the consolidated financial statements and notes to reflect the stock split.
During 2007, 2006 and 2005, Marathon had the following common stock issuances in addition to shares issued for employee stock-based awards: ?
On October 18, 2007, in connection with the acquisition of Western discussed in Note 6, Marathon distributed 29 million shares of its common stock valued at $55.70 per share to Western’s shareholders.  ?
On June 30, 2005, in connection with the acquisition of Ashland’s minority interest in MPC discussed in Note 6, Marathon distributed 35 million shares of its common stock valued at $27.23 per share to Ashland’s shareholders.
Marathon’s Board of Directors has authorized the repurchase of up to $5 billion of common stock.
Purchases under the program may be in either open market transactions, including block purchases, or in privately negotiated transactions.
The Company will use cash on hand, cash generated from operations, proceeds from potential asset sales or cash from available borrowings to acquire shares.
This program may be changed based upon the Company’s financial condition or changes in market conditions and is subject to termination prior to completion.
The repurchase program does not include specific price targets or timetables.
As of December 31, 2007, the Company had acquired 58 million common shares at a cost of $2.520 billion under the program, including 16 million common shares acquired during 2007 at a cost of $822 million and 42 million common shares acquired during 2006 at a cost of $1.698 billion.
Supplementary Information on Oil and Gas Producing Activities (Unaudited) CONTINUED Results of Operations for Oil and Gas Producing Activities
## Table 1 ##
(a) Excludes noncash effects of changes in the fair value of certain long-term natural gas sales contracts in the United Kingdom.
(b) Includes net gain on disposal of assets.
(c) Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale.
(d) Includes revenues, net of associated costs, from activities that are an integral part of Marathon’s production operations which may include processing and/or transportation of third-party production, the purchase and subsequent resale of natural gas utilized for reservoir management and providing storage capacity
Management’s Discussion and Analysis of Results of Operations Change in Accounting for Matching Buy/Sell Transactions Matching buy/sell transactions arise from arrangements in which we agree to buy a specified quantity and quality of crude oil or refined product to be delivered to a specified location while simultaneously agreeing to sell a specified quantity and quality of the same commodity at a specified location to the same counterparty.
Prior to April 1, 2006, all matching buy/sell transactions were recorded as separate sale and purchase transactions, or on a “gross” basis.
Effective for contracts entered into or modified on or after April 1, 2006, the income effects of matching buy/sell transactions are reported in cost of revenues, or on a “net” basis.
Transactions under contracts entered into before April 1, 2006 will continue to be reported on a “gross” basis.
This accounting change had no effect on net income but the amounts of revenues and cost of revenues recognized after April 1, 2006 are less than the amounts that would have been recognized under previous accounting practices.
See Note 2 to the consolidated financial statements.
Additionally, this accounting change impacts the comparability of certain operating statistics, most notably “refining and wholesale marketing gross margin per gallon.
” While this change does not have an effect on the refining and wholesale marketing gross margin (the numerator for calculating this statistic), sales volumes (the denominator for calculating this statistic) recognized after April 1, 2006 are less than the amount that would have been recognized under previous accounting practices because volumes related to matching buy/sell transactions under contracts entered into or modified on or after April 1, 2006 have been excluded.
Accordingly, the resulting refining and wholesale marketing gross margin per gallon statistic will be higher than that same statistic calculated from amounts determined under previous accounting practices.
As a result, this accounting change impacts the comparability of revenues, cost of revenues and the refining and wholesale marketing gross margin per gallon for all periods presented.
Consolidated Results of Operations Revenues for each of the last three years are summarized in the following table.
## Table 2 ##
E&P segment revenues increased $145 million in 2007 from 2006 and $1.001 billion in 2006 from 2005.
The 2007 increase was primarily related to increased international crude oil marketing activities.
Higher liquid hydrocarbon realized prices were not sufficient to offset the impact of sales volume declines as illustrated in the table below.
Both liquid hydrocarbon and natural gas sales volumes from domestic operations decreased in 2007 primarily due to normal production declines in the Gulf of Mexico and Permian Basin, while international liquid hydrocarbon sales volumes were lower primarily because our Libya sales returned to normal levels compared to 2006, which included volumes owed to our account upon the resumption of our operations there.
While international natural gas sales volumes increased, the majority of the increase was due to the start-up of the LNG production facility in Equatorial Guinea in the second quarter of 2007.
This increase in fixed-price sales volumes also contributed to the decline in our average international natural gas realizations.
Net cash used in investing activities totaled $8.102 billion in 2007, compared with $2.955 billion in 2006 and $3.127 billion in 2005.
Significant investing activities include capital expenditures, acquisitions of businesses and asset disposals.
Capital expenditures by segment for continuing operations for each of the last three years are summarized in the following table.

<table><tr><td></td><td>Stock-Based Performance Awards</td><td>WeightedAverage GrantDate Fair Value</td><td>Restricted Stock Awards</td><td>WeightedAverage GrantDate Fair Value</td></tr><tr><td>Unvested at December 31, 2005</td><td>897,200</td><td>$14.97</td><td>1,971,112</td><td>$23.97</td></tr><tr><td>Granted</td><td>135,696(a)</td><td>38.41</td><td>437,960</td><td>40.45</td></tr><tr><td>Vested</td><td>-546,896</td><td>19.15</td><td>-777,194</td><td>20.59</td></tr><tr><td>Forfeited</td><td>-12,000</td><td>16.81</td><td>-79,580</td><td>26.55</td></tr><tr><td>Unvested at December 31, 2006</td><td>474,000</td><td>16.81</td><td>1,552,298</td><td>30.21</td></tr><tr><td>Granted</td><td>393,420(a)</td><td>44.13</td><td>572,897</td><td>54.97</td></tr><tr><td>Vested</td><td>-867,420</td><td>29.20</td><td>-557,096</td><td>28.86</td></tr><tr><td>Forfeited</td><td>–</td><td>–</td><td>-40,268</td><td>34.55</td></tr><tr><td>Unvested at December 31, 2007</td><td>–</td><td>–</td><td>1,527,831</td><td>39.87</td></tr></table>
<table><tr><td colspan="2"><i>(In millions)</i></td><td>United States</td><td>Europe</td><td>Africa</td><td>Other Int’l</td><td>Total</td></tr><tr><td> 2007</td><td> Revenues and other income:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Sales<sup>(a)</sup></td><td>$2,110</td><td>$1,198</td><td>$1,380</td><td>$–</td><td>$4,688</td></tr><tr><td></td><td>Transfers</td><td>299</td><td>60</td><td>1,031</td><td>–</td><td>1,390</td></tr><tr><td></td><td>Other income<sup>(b)</sup></td><td>3</td><td>–</td><td>2</td><td>7</td><td>12</td></tr><tr><td></td><td>Total revenues</td><td>2,412</td><td>1,258</td><td>2,413</td><td>7</td><td>6,090</td></tr><tr><td></td><td>Expenses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Production costs</td><td>-550</td><td>-234</td><td>-164</td><td>–</td><td>-948</td></tr><tr><td></td><td>Transportation costs<sup>(c)</sup></td><td>-122</td><td>-39</td><td>-28</td><td>–</td><td>-189</td></tr><tr><td></td><td>Exploration expenses</td><td>-274</td><td>-23</td><td>-118</td><td>-37</td><td>-452</td></tr><tr><td></td><td>Depreciation, depletion and amortization</td><td>-486</td><td>-278</td><td>-130</td><td>–</td><td>-894</td></tr><tr><td></td><td>Administrative expenses</td><td>-56</td><td>-11</td><td>-6</td><td>-34</td><td>-107</td></tr><tr><td></td><td>Total expenses</td><td>-1,488</td><td>-585</td><td>-446</td><td>-71</td><td>-2,590</td></tr><tr><td></td><td>Other production-related income<sup>(d)</sup></td><td>–</td><td>103</td><td>6</td><td>–</td><td>109</td></tr><tr><td></td><td>Results before income taxes</td><td>924</td><td>776</td><td>1,973</td><td>-64</td><td>3,609</td></tr><tr><td></td><td>Income tax provision (benefit)</td><td>343</td><td>377</td><td>1,368</td><td>-24</td><td>2,064</td></tr><tr><td></td><td>Results of continuing operations</td><td>$581</td><td>$399</td><td>$605</td><td>$-40</td><td>$1,545</td></tr><tr><td></td><td>Results of discontinued operations</td><td>$–</td><td>$–</td><td>$–</td><td>$8</td><td>$8</td></tr><tr><td>2006</td><td>Revenues and other income:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Sales<sup>(a)</sup></td><td>$2,329</td><td>$1,240</td><td>$1,300</td><td>$–</td><td>$4,869</td></tr><tr><td></td><td>Transfers</td><td>307</td><td>58</td><td>1,168</td><td>–</td><td>1,533</td></tr><tr><td></td><td>Other income<sup>(b)</sup></td><td>3</td><td>–</td><td>–</td><td>46</td><td>49</td></tr><tr><td></td><td>Total revenues</td><td>2,639</td><td>1,298</td><td>2,468</td><td>46</td><td>6,451</td></tr><tr><td></td><td>Expenses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Production costs</td><td>-512</td><td>-207</td><td>-126</td><td>–</td><td>-845</td></tr><tr><td></td><td>Transportation costs<sup>(c)</sup></td><td>-124</td><td>-44</td><td>-33</td><td>–</td><td>-201</td></tr><tr><td></td><td>Exploration expenses</td><td>-169</td><td>-29</td><td>-91</td><td>-73</td><td>-362</td></tr><tr><td></td><td>Depreciation, depletion and amortization</td><td>-458</td><td>-281</td><td>-127</td><td>–</td><td>-866</td></tr><tr><td></td><td>Administrative expenses</td><td>-41</td><td>-10</td><td>-6</td><td>-36</td><td>-93</td></tr><tr><td></td><td>Total expenses</td><td>-1,304</td><td>-571</td><td>-383</td><td>-109</td><td>-2,367</td></tr><tr><td></td><td>Other production-related income<sup>(d)</sup></td><td>–</td><td>73</td><td>1</td><td>–</td><td>74</td></tr><tr><td></td><td>Results before income taxes</td><td>1,335</td><td>800</td><td>2,086</td><td>-63</td><td>4,158</td></tr><tr><td></td><td>Income tax provision (benefit)</td><td>489</td><td>358</td><td>1,457</td><td>-4</td><td>2,300</td></tr><tr><td></td><td>Results of continuing operations</td><td>$846</td><td>$442</td><td>$629</td><td>$-59</td><td>$1,858</td></tr><tr><td></td><td>Results of discontinued operations</td><td>$–</td><td>$–</td><td>$–</td><td>$273</td><td>$273</td></tr><tr><td>2005</td><td>Revenues and other income:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Sales<sup>(a)</sup></td><td>$2,227</td><td>$1,136</td><td>$71</td><td>$–</td><td>$3,434</td></tr><tr><td></td><td>Transfers</td><td>422</td><td>38</td><td>810</td><td>–</td><td>1,270</td></tr><tr><td></td><td>Other income<sup>(b)</sup></td><td>22</td><td>–</td><td>–</td><td>–</td><td>22</td></tr><tr><td></td><td>Total revenues</td><td>2,671</td><td>1,174</td><td>881</td><td>–</td><td>4,726</td></tr><tr><td></td><td>Expenses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Production costs</td><td>-448</td><td>-170</td><td>-82</td><td>-3</td><td>-703</td></tr><tr><td></td><td>Transportation costs<sup>(c)</sup></td><td>-114</td><td>-40</td><td>-27</td><td>–</td><td>-181</td></tr><tr><td></td><td>Exploration expenses</td><td>-118</td><td>-31</td><td>-27</td><td>-38</td><td>-214</td></tr><tr><td></td><td>Depreciation, depletion and amortization</td><td>-411</td><td>-255</td><td>-87</td><td>–</td><td>-753</td></tr><tr><td></td><td>Administrative expenses</td><td>-34</td><td>-8</td><td>-5</td><td>-25</td><td>-72</td></tr><tr><td></td><td>Total expenses</td><td>-1,125</td><td>-504</td><td>-228</td><td>-66</td><td>-1,923</td></tr><tr><td></td><td>Other production-related income<sup>(d)</sup></td><td>2</td><td>44</td><td>–</td><td>–</td><td>46</td></tr><tr><td></td><td>Results before income taxes</td><td>1,548</td><td>714</td><td>653</td><td>-66</td><td>2,849</td></tr><tr><td></td><td>Income tax provision (benefit)</td><td>572</td><td>256</td><td>199</td><td>-13</td><td>1,014</td></tr><tr><td></td><td>Results of continuing operations</td><td>$976</td><td>$458</td><td>$454</td><td>$-53</td><td>$1,835</td></tr><tr><td></td><td>Results of discontinued operations</td><td>$–</td><td>$–</td><td>$–</td><td>$42</td><td>$42</td></tr></table>
<table><tr><td><i>(In millions)</i></td><td>2007</td><td>2006</td><td>2005</td></tr><tr><td>E&P</td><td>$9,155</td><td>$9,010</td><td>$8,009</td></tr><tr><td>OSM</td><td>221</td><td>—</td><td>—</td></tr><tr><td>RM&T</td><td>56,075</td><td>55,941</td><td>56,003</td></tr><tr><td>IG</td><td>218</td><td>179</td><td>236</td></tr><tr><td>Segment revenues</td><td>65,669</td><td>65,130</td><td>64,248</td></tr><tr><td>Elimination of intersegment revenues</td><td>-885</td><td>-688</td><td>-876</td></tr><tr><td>Gain (loss) on long-term U.K. gas contracts</td><td>-232</td><td>454</td><td>-386</td></tr><tr><td>Total revenues</td><td>$64,552</td><td>$64,896</td><td>$62,986</td></tr><tr><td>Items included in both revenue and costs and expenses:</td><td></td><td></td><td></td></tr><tr><td>Consumer excise taxes on petroleum products and merchandise</td><td>$5,163</td><td>$4,979</td><td>$4,715</td></tr><tr><td>Matching crude oil and refined product buy/sell transactions settled in cash:</td><td></td><td></td><td></td></tr><tr><td>E&P</td><td>—</td><td>16</td><td>123</td></tr><tr><td>RM&T</td><td>127</td><td>5,441</td><td>12,513</td></tr><tr><td>Total buy/sell transactions included in revenues</td><td>$127</td><td>$5,457</td><td>$12,636</td></tr></table>

Question: Which year is Sales the least in United States ?
Answer: 2007