The following table provides the minimum annual future rental commitment under operating leases that have initial or remaining non-cancelable lease terms over the next five years and thereafter:
## Table 0 ##
The Company has a series of agreements with various public entities (the “Partners”) to establish certain joint ventures, commonly referred to as “public-private partnerships.
” Under the public-private partnerships, the Company constructed utility plant, financed by the Company, and the Partners constructed utility plant (connected to the Company’s property), financed by the Partners.
The Company agreed to transfer and convey some of its real and personal property to the Partners in exchange for an equal principal amount of Industrial Development Bonds (“IDBs”), issued by the Partners under a state Industrial Development Bond and Commercial Development Act.
The Company leased back the total facilities, including portions funded by both the Company and the Partners, under leases for a period of 40 years.
The leases related to the portion of the facilities funded by the Company have required payments from the Company to the Partners that approximate the payments required by the terms of the IDBs from the Partners to the Company (as the holder of the IDBs).
As the ownership of the portion of the facilities constructed by the Company will revert back to the Company at the end of the lease, the Company has recorded these as capital leases.
The lease obligation and the receivable for the principal amount of the IDBs are presented by the Company on a net basis.
The carrying value of the facilities funded by the Company recognized as a capital lease asset was $147 million and $150 million as of December 31, 2018 and 2017, respectively, which is presented in Property, plant and equipment on the Consolidated Balance Sheets.
The future payments under the lease obligations are equal to and offset by the payments receivable under the IDBs.
As of December 31, 2018, the minimum annual future rental commitment under the operating leases for the portion of the facilities funded by the Partners that have initial or remaining non-cancelable lease terms in excess of one year included in the preceding minimum annual rental commitments are $4 million in 2019 through 2023, and $59 million thereafter.
Note 20: Segment Information The Company’s operating segments are comprised of the revenue-generating components of its businesses for which separate financial information is internally produced and regularly used by management to make operating decisions and assess performance.
The Company operates its businesses primarily through one reportable segment, the Regulated Businesses segment.
The Company also operates market-based businesses that provide a broad range of related and complementary water and wastewater services within non-reportable operating segments, collectively referred to as the Market-Based Businesses.
The Regulated Businesses segment is the largest component of the Company’s business and includes 20 subsidiaries that provide water and wastewater services to customers in 16 states.
The Company’s primary Market-Based Businesses include the Homeowner Services Group, which provides warranty protection programs to residential and smaller commercial customers; the Military Services Group, which provides water and wastewater services to the U. S.  government on military installations; and Keystone, which provides water transfer services for shale natural gas exploration and production companies.
Supplementary Information on Oil and Gas Producing Activities (Unaudited) The supplementary information is disclosed by the following geographic areas: the United States; Europe, which primarily includes activities in the United Kingdom, Ireland and Norway; Africa, which primarily includes activities in Angola, Equatorial Guinea, Gabon and Libya; and Other International, which includes activities in Canada, and other international locations outside of Europe and Africa.
Discontinued operations represent Marathon’s Russian oil exploration and production businesses that were sold in 2006.
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a)
## Table 1 ##
(a) Includes capitalized asset retirement costs and the associated accumulated amortization.
Costs Incurred for Property Acquisition, Exploration and Development
## Table 2 ##
(a) Includes costs incurred whether capitalized or expensed.
(b) Includes $23 million, $12 million and $12 million of costs incurred prior to assignment of proved reserves in 2007, 2006 and 2005.
The associated reserves were awaiting full project sanction at the end of the applicable year.
(c) Includes the effect of foreign currency fluctuations.
In 2007, capitalized asset retirement costs decreased in the United States primarily as a result of lower inflation factors.
125 million boe.
Of the total net proved reserve additions, 38 million boe were proved developed and 50 million boe were proved undeveloped reserves.
During 2007, we transferred 109 million boe from proved undeveloped to proved developed reserves.
Costs incurred for the periods ended December 31, 2007, 2006 and 2005 relating to the development of proved undeveloped liquid hydrocarbon and natural gas reserves, were $1.250 billion, $1.010 billion and $955 million.
As of December 31, 2007, estimated future development costs relating to the development of proved undeveloped liquid hydrocarbon and natural gas reserves for the years 2008 through 2010 are projected to be $859 million, $376 million and $293 million.
The above estimated quantities of net proved liquid hydrocarbon and natural gas reserves and estimated future development costs relating to the development of proved undeveloped liquid hydrocarbon and natural gas reserves are forward-looking statements and are based on a number of assumptions, including (among others) commodity prices, presently known physical data concerning size and character of the reservoirs, economic recoverability, technology developments, future drilling success, industry economic conditions, levels of cash flow from operations, production experience and other operating considerations.
To the extent these assumptions prove inaccurate, actual recoveries and development costs could be different than current estimates.
For a discussion of the proved liquid hydrocarbon and natural gas reserve estimation process, see Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Estimates – Estimated Net Recoverable Reserve Quantities – Proved Liquid Hydrocarbon and Natural Gas Reserves, and for additional details of the estimated quantities of proved reserves at the end of each of the last three years, see Financial Statements and Supplementary Data – Supplementary Information on Oil and Gas Producing Activities – Estimated Quantities of Proved Oil and Natural Gas Reserves.
We filed reports with the U. S.  Department of Energy (“DOE”) for 2006 disclosing our total year-end estimated liquid hydrocarbon and natural gas reserves.
The year-end estimates reported to the DOE are the same estimates reported in the Supplementary Information on Oil and Gas Producing Activities.
Delivery Commitments We sell liquid hydrocarbons and natural gas under a variety of contractual arrangements, some of which specify the delivery of a fixed and determinable quantity.
Worldwide, we are contractually committed to deliver 180 bcf of natural gas in the future.
These contracts have various expiration dates through the year 2018.
Our proved reserves in Alaska, the United Kingdom and other locations, are sufficient to fulfill these delivery commitments.
Net Liquid Hydrocarbon and Natural Gas Sales The following tables set forth the daily average net sales volumes of liquid hydrocarbons and natural gas for each of the last three years.

<table><tr><td></td><td>Amount</td></tr><tr><td>2019</td><td>$17</td></tr><tr><td>2020</td><td>15</td></tr><tr><td>2021</td><td>12</td></tr><tr><td>2022</td><td>11</td></tr><tr><td>2023</td><td>6</td></tr><tr><td>Thereafter</td><td>80</td></tr></table>
<table><tr><td colspan="2"><i>(In millions)</i></td><td>December 31</td><td>UnitedStates</td><td>Europe</td><td>Africa</td><td>OtherInt’l</td><td>Total</td></tr><tr><td> 2007</td><td> Capitalized costs:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved properties</td><td></td><td>$8,325</td><td>$8,191</td><td>$2,108</td><td>$60</td><td>$18,684</td></tr><tr><td></td><td>Unproved properties</td><td></td><td>1,133</td><td>64</td><td>474</td><td>261</td><td>1,932</td></tr><tr><td></td><td>Suspended exploratory wells</td><td></td><td>312</td><td>76</td><td>395</td><td>–</td><td>783</td></tr><tr><td></td><td>Total</td><td></td><td>9,770</td><td>8,331</td><td>2,977</td><td>321</td><td>21,399</td></tr><tr><td></td><td>Accumulated depreciation, depletion and amortization:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved properties</td><td></td><td>5,478</td><td>5,070</td><td>482</td><td>1</td><td>11,031</td></tr><tr><td></td><td>Unproved properties</td><td></td><td>67</td><td>6</td><td>9</td><td>0</td><td>82</td></tr><tr><td></td><td>Total</td><td></td><td>5,545</td><td>5,076</td><td>491</td><td>1</td><td>11,113</td></tr><tr><td></td><td>Net capitalized costs</td><td></td><td>$4,225</td><td>$3,255</td><td>$2,486</td><td>$320</td><td>$10,286</td></tr><tr><td> 2006</td><td>Capitalized costs:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved properties</td><td></td><td>$7,682</td><td>$7,216</td><td>$2,044</td><td>$1</td><td>$16,943</td></tr><tr><td></td><td>Unproved properties</td><td></td><td>938</td><td>77</td><td>481</td><td>4</td><td>1,500</td></tr><tr><td></td><td>Suspended exploratory wells</td><td></td><td>156</td><td>25</td><td>289</td><td>–</td><td>470</td></tr><tr><td></td><td>Total</td><td></td><td>8,776</td><td>7,318</td><td>2,814</td><td>5</td><td>18,913</td></tr><tr><td></td><td>Accumulated depreciation, depletion and amortization:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved properties</td><td></td><td>5,141</td><td>4,771</td><td>412</td><td>1</td><td>10,325</td></tr><tr><td></td><td>Unproved properties</td><td></td><td>42</td><td>1</td><td>9</td><td>–</td><td>52</td></tr><tr><td></td><td>Total</td><td></td><td>5,183</td><td>4,772</td><td>421</td><td>1</td><td>10,377</td></tr><tr><td></td><td>Net capitalized costs</td><td></td><td>$3,593</td><td>$2,546</td><td>$2,393</td><td>$4</td><td>$8,536</td></tr></table>
<table><tr><td colspan="2"><i>(In millions)</i></td><td>United States</td><td>Europe</td><td>Africa</td><td>OtherInt’l</td><td>ContinuingOperations</td><td>DiscontinuedOperations</td><td>Total</td></tr><tr><td> 2007</td><td> Property acquisition:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved</td><td>$4</td><td>$–</td><td>$–</td><td>$–</td><td>$4</td><td>$–</td><td>$4</td></tr><tr><td></td><td>Unproved</td><td>142</td><td>1</td><td>1</td><td>315</td><td>459</td><td>–</td><td>459</td></tr><tr><td></td><td>Exploration</td><td>523</td><td>68</td><td>219</td><td>44</td><td>854</td><td>–</td><td>854</td></tr><tr><td></td><td>Development<sup>(b)</sup></td><td>759</td><td>806</td><td>85</td><td>–</td><td>1,650</td><td>–</td><td>1,650</td></tr><tr><td></td><td>Capitalized asset retirement costs<sup>(c)</sup></td><td>-62</td><td>61</td><td>9</td><td>–</td><td>8</td><td>–</td><td>8</td></tr><tr><td></td><td>Total</td><td>$1,366</td><td>$936</td><td>$314</td><td>$359</td><td>$2,975</td><td>$–</td><td>$2,975</td></tr><tr><td>2006</td><td>Property acquisition:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved</td><td>$4</td><td>$–</td><td>$19</td><td>$–</td><td>$23</td><td>$–</td><td>$23</td></tr><tr><td></td><td>Unproved</td><td>526</td><td>3</td><td>3</td><td>4</td><td>536</td><td>–</td><td>536</td></tr><tr><td></td><td>Exploration</td><td>224</td><td>36</td><td>169</td><td>70</td><td>499</td><td>2</td><td>501</td></tr><tr><td></td><td>Development<sup>(b)</sup></td><td>603</td><td>607</td><td>40</td><td>–</td><td>1,250</td><td>43</td><td>1,293</td></tr><tr><td></td><td>Capitalized asset retirement costs<sup>(c)</sup></td><td>78</td><td>201</td><td>13</td><td>2</td><td>294</td><td>1</td><td>295</td></tr><tr><td></td><td>Total</td><td>$1,435</td><td>$847</td><td>$244</td><td>$76</td><td>$2,602</td><td>$46</td><td>$2,648</td></tr><tr><td>2005</td><td>Property acquisition:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Proved</td><td>$3</td><td>$–</td><td>$390</td><td>$–</td><td>$393</td><td>$–</td><td>$393</td></tr><tr><td></td><td>Unproved</td><td>31</td><td>–</td><td>381</td><td>–</td><td>412</td><td>–</td><td>412</td></tr><tr><td></td><td>Exploration</td><td>186</td><td>48</td><td>95</td><td>14</td><td>343</td><td>10</td><td>353</td></tr><tr><td></td><td>Development<sup>(b)</sup></td><td>465</td><td>531</td><td>32</td><td>–</td><td>1,028</td><td>85</td><td>1,113</td></tr><tr><td></td><td>Capitalized asset retirement costs<sup>(c)</sup></td><td>35</td><td>108</td><td>12</td><td>1</td><td>156</td><td>2</td><td>158</td></tr><tr><td></td><td>Total</td><td>$720</td><td>$687</td><td>$910</td><td>$15</td><td>$2,332</td><td>$97</td><td>$2,429</td></tr></table>

Question: Which section is Proved properties the lowest in 2007?