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| Refining District Minnesota-Wisconsin-North Dakota-South Dakota 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 | 2 | |||||||||
| 2000's | 151 | 186 | ||||||||
| 2010's | 277 | 360 | 662 | 1,058 | 1,840 | 2,945 | 3,111 | 3,404 | 4,363 | 5,453 |
| 2020's | 6,452 | 7,044 | 6,928 | 7,820 | 8,442 |
| - = 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 |