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| Rocky Mountain (PADD 4) Ending Stocks 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2010's | 152 | 156 | 147 | 183 | 274 | 335 | 258 | 275 | 267 | 273 |
| 2020's | 436 | 438 | 425 | 454 | 465 |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 11/28/2025 |
| Next Release Date: 8/31/2026 |