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| Oklahoma, Kansas, Missouri Refinery District API Gravity (Weighted Average) of Crude Oil Input to Refineries (Degree) | ||||||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 37.43 | 37.45 | 37.44 | 37.17 | 36.69 | |||||
| 1990's | 36.30 | 35.89 | 35.92 | 36.08 | 35.94 | 35.95 | 36.24 | 35.91 | 35.19 | 35.68 |
| 2000's | 35.66 | 35.00 | 35.19 | 35.41 | 35.15 | 34.53 | 34.40 | 34.40 | 34.97 | 35.16 |
| 2010's | 35.26 | 36.17 | 36.50 | 36.88 | 37.32 | 37.35 | 36.99 | 37.32 | 37.76 | 38.84 |
| 2020's | 38.67 | 38.86 | 39.13 | 39.29 | 39.16 | 39.48 |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 3/6/2026 |
| Next Release Date: 8/31/2026 |