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| Midwest (PADD 2) Ending Stocks of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 1,637 | 2,140 | 1,961 | 2,139 | 1,936 | 2,040 | 2,637 | 2,270 | 2,403 | |
| 1990's | 2,479 | 2,512 | 2,795 | 2,476 | 1,907 | 2,169 | 2,005 | 1,993 | 1,736 | 1,615 |
| 2000's | 1,779 | 1,438 | 1,611 | 1,658 | 1,752 | 1,838 | 2,287 | 2,268 | 2,156 | 1,826 |
| 2010's | 1,998 | 2,066 | 2,353 | 1,651 | 1,931 | 1,940 | 1,902 | 2,160 | 2,031 | 1,907 |
| 2020's | 1,889 | 2,352 | -- | -- | -- |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 10/31/2025 |
| Next Release Date: 8/31/2026 |