Colorado Dry Natural Gas Reserves Revision Increases (Billion Cubic Feet)

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Annual

Decade	Year-0	Year-1	Year-2	Year-3	Year-4	Year-5	Year-6	Year-7	Year-8	Year-9
1970's								116	226	373
1980's	250	131	322	167	160	368	372	340	473	431
1990's	394	719	718	1,000	696	555	802	959	1,898	2,788
2000's	1,825	1,882	2,029	2,114	1,505	2,018	1,178

- = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data.

Release Date: 1/2/2008

Next Release Date: 1/31/2009

Referring Pages: