| Natural Gas Reserves Summary as of Dec. 31 | |
| (Billion Cubic Feet, unless otherwise noted) | |
| Area: |  |
Period: | |
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2004 | 2005 | 2006 | 2007 | 2008 | 2009 | View History |
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321 | 265 | 305 | 261 | 219 | 164 | 1981-2009 | |||||||||||||||||||||||||||||||||
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321 | 265 | 305 | 261 | 220 | 164 | 1981-2009 | |||||||||||||||||||||||||||||||||
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312 | 262 | 304 | 258 | 215 | 161 | 1981-2009 | |||||||||||||||||||||||||||||||||
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9 | 3 | 1 | 3 | 5 | 3 | 1981-2009 | |||||||||||||||||||||||||||||||||
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5 | 3 | 4 | 3 | 4 | 1981-2008 | ||||||||||||||||||||||||||||||||||
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| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Notes: Miscellaneous States includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee. See Definitions, Sources, and Notes link above for more information on this table. |
| Release Date: 12/30/2010 |
| Next Release Date: 6/15/2012 |
