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| Refining District Oklahoma-Kansas-Missouri Field Production of Isobutane (Thousand Barrels) | ||||||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1990's | 7,350 | 6,562 | 6,297 | 7,778 | 6,986 | 5,736 | 5,762 | |||
| 2000's | 5,763 | 6,891 | 5,544 | 5,861 | 4,618 | 5,317 | 5,461 | 5,384 | 5,830 | 5,588 |
| 2010's | 6,224 | 7,799 | 7,878 | 8,122 | 9,470 | 8,095 | 10,783 | 9,979 | 11,312 | 11,238 |
| 2020's | 11,674 | 10,555 | 11,361 | 10,774 | 10,196 |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 2/6/2026 |
| Next Release Date: 8/31/2026 |