Supplementary Information on Oil and Gas Producing Activities (Unaudited) CONTINUED Estimated Quantities of Proved Oil and Gas Reserves Estimates of proved reserves have been prepared by in-house teams of reservoir engineers and geoscience professionals.
Reserve estimates are periodically reviewed by Marathon’s Corporate Reserves Group to assure that rigorous professional standards and the reserves definitions prescribed by the U. S.  Securities and Exchange Commission (“SEC”) are consistently applied throughout the Company.
Proved reserves are the estimated quantities of oil and natural gas that geologic and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions.
Estimates of proved reserves may change, either positively or negatively, as additional information becomes available and as contractual, economic and political conditions change.
Marathon’s net proved reserve estimates have been adjusted as necessary to reflect all contractual agreements, royalty obligations and interests owned by others at the time of the estimate.
Only reserves that are estimated to be recovered during the term of the current contract have been included in the proved reserve estimate unless there is a clear and consistent history of contract extension.
Reserves from properties governed by production sharing contracts have been calculated using the “economic interest” method prescribed by the SEC.
Reserves that are not currently considered proved, such as those that may result from extensions of currently proved areas or that may result from applying secondary or tertiary recovery processes not yet tested and determined to be economic are excluded.
Purchased natural gas utilized in reservoir management and subsequently resold is also excluded.
Marathon does not have any quantities of oil and gas reserves subject to long-term supply agreements with foreign governments or authorities in which Marathon acts as producer.
Proved developed reserves are the quantities of oil and gas expected to be recovered through existing wells with existing equipment and operating methods.
In some cases, proved undeveloped reserves may require substantial new investments in additional wells and related facilities.
## Table 0 ##
Marketing We are a supplier of gasoline and distillates to resellers and consumers within our market area in the Midwest, upper Great Plains, Gulf Coast and southeastern regions of the United States.
In 2007, our refined products sales volumes totaled 21.6 billion gallons, or 1.410 mmbpd.
The average sales price of our refined products in aggregate was $86.53 per barrel for 2007.
The following table sets forth our refined products sales by product group and our average sales price for each of the last three years.
## Table 1 ##
(a) Includes matching buy/sell volumes of 24 mbpd and 77 mbpd in 2006 and 2005.
On April 1, 2006, we changed our accounting for matching buy/sell arrangements as a result of a new accounting standard.
This change resulted in lower refined products sales volumes for 2007 and the remainder of 2006 than would have been reported under our previous accounting practices.
See Note 2 to the consolidated financial statements.
The wholesale distribution of petroleum products to private brand marketers and to large commercial and industrial consumers and sales in the spot market accounted for 69 percent of our refined products sales volumes in 2007.
We sold 49 percent of our gasoline volumes and 89 percent of our distillates volumes on a wholesale or spot market basis.
Half of our propane is sold into the home heating market, with the balance being purchased by industrial consumers.
Propylene, cumene, aromatics, aliphatics and sulfur are domestically marketed to customers in the chemical industry.
Base lube oils, maleic anhydride, slack wax, extract and pitch are sold throughout the United States and Canada, with pitch products also being exported worldwide.
We market asphalt through owned and leased terminals throughout the Midwest, upper Great Plains, Gulf Coast and southeastern regions of the United States.
Our customer base includes approximately 750 asphalt-paving contractors, government entities (states, counties, cities and townships) and asphalt roofing shingle manufacturers.
We have blended ethanol with gasoline for over 15 years and increased our blending program in 2007, in part due to renewable fuel mandates.
We blended 41 mbpd of ethanol into gasoline in 2007 and 35 mbpd in both 2006 and 2005.
The future expansion or contraction of our ethanol blending program will be driven by the economics of the ethanol supply and changes in government regulations.
We sell reformulated gasoline in parts of our marketing territory, primarily Chicago, Illinois; Louisville, Kentucky; northern Kentucky; Milwaukee, Wisconsin and Hartford, Illinois, and we sell low-vapor-pressure gasoline in nine states.
We also sell biodiesel in Minnesota, Illinois and Kentucky.
As of December 31, 2007, we supplied petroleum products to about 4,400 Marathon branded-retail outlets located primarily in Ohio, Michigan, Indiana, Kentucky and Illinois.
Branded retail outlets are also located in Georgia, Florida, Minnesota, Wisconsin, North Carolina, Tennessee, West Virginia, Virginia, South Carolina, Alabama, Pennsylvania, and Texas.
Sales to Marathon-brand jobbers and dealers accounted for 16 percent of our refined product sales volumes in 2007.
Speedway SuperAmerica LLC (“SSA”), our wholly-owned subsidiary, sells gasoline and diesel fuel primarily through retail outlets that we operate.
Sales of refined products through these SSA retail outlets accounted for 15 percent of our refined products sales volumes in 2007.
As of December 31, 2007, SSA had 1,636 retail outlets in nine states that sold petroleum products and convenience store merchandise and services, primarily under the brand names “Speedway” and “SuperAmerica.
” SSA’s revenues from the sale of non-petroleum merchandise totaled $2.796 billion in 2007, compared with $2.706 billion in 2006.
Profit levels from the sale of such merchandise and services tend to be less volatile than profit levels from the retail sale of gasoline and diesel fuel.
SSA also operates 59 Valvoline Instant Oil Change retail outlets located in Michigan and northwest Ohio.
Pilot Travel Centers LLC (“PTC”), our joint venture with Pilot Corporation (“Pilot”), is the largest operator of travel centers in the United States with 286 locations in 37 states and Canada at December 31, 2007.
The travel centers offer diesel fuel, gasoline and a variety of other services, including on-premises brand-name restaurants at many locations.
Pilot and Marathon each own a 50 percent interest in PTC.
Segment Results: 2009 compared to 2008 Segment income for 2009 and 2008 is summarized and reconciled to net income in the following table.
## Table 2 ##
(a) Impairments in 2009 reflect $45 million ($70 million pretax) writeoff of a portion of the contingent proceeds from the sale of the Corrib natural gas development (see Note 7 to the consolidated financial statements) that was recorded the fourth quarter of 2009 on the basis of new public information regarding the pipeline that would transport gas from the Corrib development.
Impairments in 2008 include a $1,412 million impairment of goodwill related to the OSM reporting unit (see Note 15 to the consolidated financial statements) and a $25 million after-tax impairment ($40 million pretax) related to our investments in ethanol producing facilities (see Note 13 to the consolidated financial statements).
(b) Amounts relate to natural gas contracts in the U.  K.  that are accounted for as derivative instruments and recorded at fair value.
United States E&P income decreased $814 million, or 94 percent, from 2008 to 2009.
The majority of the income decrease was due to liquid hydrocarbon and natural gas realizations averaging almost 40 percent lower than in 2008, as well as lower natural gas sales volumes and higher DD&A, partially offset by lower operating costs and exploration expenses.
Exploration expenses were $153 million for the year 2009, compared to $238 million for 2008, reflecting decreased geological and geophysical spending and lower exploration dry well expense.
International E&P income decreased $521 million, or 31 percent, from 2008 to 2009.
The majority of the income decrease is tied to lower liquid hydrocarbon and natural gas realizations and overall higher DD&A, primarily associated with a full year of Alvheim production.
The revenue impact of lower realizations was partially offset by improved sales volumes from Norway and Equatorial Guinea.
Additionally, operating costs and exploration expenses were lower.
Exploration expenses were $154 million for the full year 2009, compared to $251 million for 2008, reflecting lower dry well expense and decreased geological and geophysical spending.
OSM segment income decreased $214 million, or 83 percent, from 2008 to 2009.
The majority of the decrease in income for 2009 was due to synthetic crude oil realizations averaging almost 40 percent lower than in 2008, partially offset by lower blendstock and energy costs.
Results for 2008 included after-tax gains on crude oil derivative instruments of $32 million, while the impact of derivatives on the 2009 periods was not significant.
Those derivative instruments expired December 2009 (see Item 7A.
Quantitative and Qualitative Disclosures about Market Risk).
IG segment income decreased $212 million, or 70 percent, from 2008 to 2009.
The decrease in income was primarily the result of lower realizations for LNG and methanol.
As evidenced by higher sales volumes, strong operational reliability at the EG LNG facility throughout 2009 partially offset the impact of lower prices.
The LNG production facility averaged higher than 95 percent operational availability during 2009.
We hold a 60 percent interest in the facility.

<table><tr><td><i>(Millions of barrels)</i></td><td>United States</td><td>Europe</td><td>Africa (a)</td><td>Continuing Operations</td><td>Discontinued Operations</td></tr><tr><td> Liquid Hydrocarbons</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td> Proved developed and undeveloped reserves:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Beginning of year – 2005</td><td>191</td><td>107</td><td>223</td><td>521</td><td>39</td></tr><tr><td>Purchase of reserves in place<sup>(b)</sup></td><td>–</td><td>–</td><td>3</td><td>3</td><td>–</td></tr><tr><td>Re-entry to Libya concessions</td><td>–</td><td>–</td><td>165</td><td>165</td><td>–</td></tr><tr><td>Revisions of previous estimates</td><td>10</td><td>4</td><td>1</td><td>15</td><td>3</td></tr><tr><td>Improved recovery</td><td>2</td><td>–</td><td>–</td><td>2</td><td>–</td></tr><tr><td>Extensions, discoveries and other additions</td><td>15</td><td>–</td><td>–</td><td>15</td><td>12</td></tr><tr><td>Production</td><td>-28</td><td>-13</td><td>-19</td><td>-60</td><td>-10</td></tr><tr><td>Sales of reserves in place<sup>(b)</sup></td><td>-1</td><td>–</td><td>–</td><td>-1</td><td>–</td></tr><tr><td>End of year – 2005</td><td>189</td><td>98</td><td>373</td><td>660</td><td>44</td></tr><tr><td>Purchase of reserves in place<sup>(b)</sup></td><td>–</td><td>–</td><td>1</td><td>1</td><td>–</td></tr><tr><td>Revisions of previous estimates</td><td>2</td><td>8</td><td>49</td><td>59</td><td>1</td></tr><tr><td>Improved recovery</td><td>3</td><td>–</td><td>–</td><td>3</td><td>–</td></tr><tr><td>Extensions, discoveries and other additions</td><td>6</td><td>15</td><td>15</td><td>36</td><td>4</td></tr><tr><td>Production</td><td>-28</td><td>-13</td><td>-41</td><td>-82</td><td>-4</td></tr><tr><td>Sales of reserves in place<sup>(b)</sup></td><td>–</td><td>–</td><td>–</td><td>–</td><td>-45</td></tr><tr><td>End of year – 2006</td><td>172</td><td>108</td><td>397</td><td>677</td><td>–</td></tr><tr><td>Purchase of reserves in place<sup>(b)</sup></td><td>2</td><td>–</td><td>–</td><td>2</td><td>–</td></tr><tr><td>Revisions of previous estimates</td><td>2</td><td>7</td><td>-8</td><td>1</td><td>–</td></tr><tr><td>Improved recovery</td><td>8</td><td>–</td><td>–</td><td>8</td><td>–</td></tr><tr><td>Extensions, discoveries and other additions</td><td>5</td><td>13</td><td>16</td><td>34</td><td>–</td></tr><tr><td>Production</td><td>-23</td><td>-13</td><td>-36</td><td>-72</td><td>–</td></tr><tr><td>End of year – 2007</td><td>166</td><td>115</td><td>369</td><td>650</td><td>–</td></tr><tr><td>Proved developed reserves:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Beginning of year – 2005</td><td>171</td><td>41</td><td>147</td><td>359</td><td>27</td></tr><tr><td>End of year – 2005</td><td>165</td><td>39</td><td>368</td><td>572</td><td>31</td></tr><tr><td>End of year – 2006</td><td>150</td><td>35</td><td>381</td><td>566</td><td>–</td></tr><tr><td>End of year – 2007</td><td>135</td><td>32</td><td>304</td><td>471</td><td>–</td></tr></table>
<table><tr><td><i>(Thousands of barrels per day)</i></td><td>2007</td><td>2006</td><td>2005</td></tr><tr><td>Gasoline</td><td>791</td><td>804</td><td>836</td></tr><tr><td>Distillates</td><td>377</td><td>375</td><td>385</td></tr><tr><td>Propane</td><td>23</td><td>23</td><td>22</td></tr><tr><td>Feedstocks and Special Products</td><td>103</td><td>106</td><td>96</td></tr><tr><td>Heavy Fuel Oil</td><td>29</td><td>26</td><td>29</td></tr><tr><td>Asphalt</td><td>87</td><td>91</td><td>87</td></tr><tr><td>TOTAL<sup>(a)</sup></td><td>1,410</td><td>1,425</td><td>1,455</td></tr><tr><td><i>Average sales price (Dollars per barrel)</i></td><td>$86.53</td><td>$77.76</td><td>$66.42</td></tr></table>
<table><tr><td><i>(In millions)</i></td><td>2009</td><td>2008</td></tr><tr><td>E&P</td><td></td><td></td></tr><tr><td>United States</td><td>$55</td><td>$869</td></tr><tr><td>International</td><td>1,166</td><td>1,687</td></tr><tr><td>E&P segment</td><td>1,221</td><td>2,556</td></tr><tr><td>OSM</td><td>44</td><td>258</td></tr><tr><td>IG</td><td>90</td><td>302</td></tr><tr><td>RM&T</td><td>464</td><td>1,179</td></tr><tr><td>Segment income</td><td>1,819</td><td>4,295</td></tr><tr><td>Items not allocated to segments, net of income taxes:</td><td></td><td></td></tr><tr><td>Corporate and other unallocated items</td><td>-422</td><td>-75</td></tr><tr><td>Foreign currency effects on tax balances</td><td>-319</td><td>249</td></tr><tr><td>Impairments<sup>(a)</sup></td><td>-45</td><td>-1,437</td></tr><tr><td>Gain on U.K. natural gas contracts<sup>(b)</sup></td><td>37</td><td>111</td></tr><tr><td>Gain on disposal of assets</td><td>114</td><td>241</td></tr><tr><td>Discontinued operations</td><td>279</td><td>144</td></tr><tr><td>Net income</td><td>$1,463</td><td>$3,528</td></tr></table>

Question: what was the decline in matching buy/sell volumes in mbpd between 2006 and 2005?
Answer: -53