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| Appalachian No. 1 Refinery District API Gravity (Weighted Average) of Crude Oil Input to Refineries (Degrees) (Degree) | ||||||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 39.52 | 38.53 | 38.44 | 38.66 | 37.93 | |||||
| 1990's | 37.87 | 37.19 | 37.42 | 36.80 | 35.69 | 35.12 | 35.33 | 34.62 | 34.59 | 33.89 |
| 2000's | 32.22 | 32.89 | 33.00 | 32.24 | 32.29 | 32.34 | 31.69 | 31.57 | 31.84 | 32.30 |
| 2010's | 33.64 | 32.26 | 32.12 | 31.79 | 32.12 | 32.16 | 32.66 | 32.35 | 32.58 | 32.33 |
| 2020's | 32.40 | 32.28 | 32.34 | 31.79 | 32.24 | 31.55 |
| - = 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 |