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| Oklahoma, Kansas, Missouri Refinery District Sulfur Content (Weighted Average) of Crude Oil Input to Refineries (Percent) | ||||||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 0.48 | 0.52 | 0.54 | 0.56 | 0.62 | |||||
| 1990's | 0.64 | 0.66 | 0.67 | 0.69 | 0.72 | 0.69 | 0.70 | 0.80 | 0.79 | 0.75 |
| 2000's | 0.81 | 0.87 | 0.83 | 0.86 | 0.86 | 0.90 | 0.98 | 1.08 | 0.98 | 0.95 |
| 2010's | 0.94 | 0.88 | 0.92 | 0.88 | 0.75 | 0.72 | 0.88 | 0.83 | 0.77 | 0.63 |
| 2020's | 0.64 | 0.65 | 0.66 | 0.61 | 0.65 |
| - = 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 |