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| California Refinery Isomers/Isobutane Production Capacity as of January 1 (Barrels per Stream Day) | |||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 5,700 | 4,700 | 5,900 | 12,200 | 9,500 | 5,810 | 5,810 | 5,800 | ||
| 1990's | 5,800 | 5,500 | 5,500 | 5,500 | 6,200 | 6,200 | NA | 4,700 | NA | 24,333 |
| 2000's | 24,500 | 20,300 | 15,300 | 28,300 | 30,535 | 37,550 | 37,750 | 31,150 | 31,150 | 31,150 |
| 2010's | 31,450 | 34,325 | 35,125 | 35,125 | 36,325 | 40,400 | 40,400 | 40,400 | 44,000 | 49,025 |
| 2020's | 49,000 | 49,000 | 49,000 | 49,200 | 49,200 | 45,400 |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 6/20/2025 |
| Next Release Date: 6/19/2026 |
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