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|View History: Annual Download Data (XLS File)                                              
|View History: Annual                                                                        
|View History: Annual                                                                        
|View History:                                                                               
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|U.S. Refinery Isomers/Isobutane Production Capacity as of January 1 (Barrels per Stream Day)
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|U.S. Refinery Isomers/Isobutane Production Capacity as of January 1 (Barrels per Stream Day)
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|Decade                                                                                                                            | Year-0  | Year-1  | Year-2  | Year-3  | Year-4  | Year-5  | Year-6  | Year-7  | Year-8  | Year-9 
|--------------------------------------------------------------------------------------------------------------------------------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | ------- | -------
|1980's                                                                                                                            |         |         | 67,700  | 67,500  | 70,700  | 73,600  | 51,600  | 59,028  | 67,853  | 69,643 
|1990's                                                                                                                            | 67,893  | 70,693  | 74,793  | 89,343  | 90,943  | 98,350  | NA      | 108,533 | NA      | 166,695
|2000's                                                                                                                            | 159,946 | 185,188 | 194,203 | 218,623 | 215,958 | 226,348 | 230,714 | 227,128 | 248,159 | 245,960
|2010's                                                                                                                            | 221,374 | 213,449 | 191,467 | 191,760 | 192,960 | 189,346 | 192,085 | 182,085 | 173,300 | 174,125
|2020's                                                                                                                            | 172,600 | 164,018 | 168,318 | 167,218 | 168,518 |         |         |         |         |        
|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 6/14/2024                                                                                                          
|Next Release Date: June 2025