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| Refining District Minnesota-Wisconsin-North Dakota-South Dakota Refinery and Blender Net Production of Normal Butylene (Thousand Barrels per Day) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1996 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1997 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1998 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1999 | W | W | W | W | W | W | W | W | W | W | W | W |
| 2000 | W | W | W | W | W | W | W | W | W | W | W | W |
| 2001 | W | W | W | W | W | W | W | W | W | W | W | W |
| 2002 | W | W | W | W | W | W | W | W | W | W | W | W |
| 2003 | W | W | W | W | W | W | W | W | W | W | W | W |
| 2011 | 1 | |||||||||||
| 2018 | 0 | 0 | 0 | |||||||||
| 2021 | 0 | 0 | -1 | -1 | ||||||||
| 2022 | 0 | -1 | 0 | |||||||||
| 2024 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | ||
| 2025 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 5/29/2026 |
| Next Release Date: 6/30/2026 |