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| Montana Nonassociated Natural Gas, Wet After Lease Separation, Reserves Revision Decreases (Billion Cubic Feet) | |||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1970's | 80 | |||||||||
| 1980's | 179 | 63 | 83 | 63 | 61 | 33 | 22 | 8 | 25 | 16 |
| 1990's | 25 | 30 | 13 | 6 | 71 | 11 | 11 | 130 | 37 | 28 |
| 2000's | 125 | 82 | 96 | 23 | 113 | 109 | 60 | 43 | 40 | 148 |
| 2010's | 70 | 65 | 175 | 8 | 7 | 7 | 9 | 4 | 5 | 37 |
| 2020's | 1 | 14 |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 12/30/2022 |
| Next Release Date: 12/29/2023 |