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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 Normal Butane/Butylene Working Storage Capacity as of January 1 (Thousand Barrels)
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|U.S. Refinery Normal Butane/Butylene Working Storage Capacity as of January 1 (Thousand Barrels)
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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                                                                                                                            |        |        | 17,116 | 20,386 | 18,792 | 18,723 | 18,444 | 19,040 | 17,979 | 17,726
|1990's                                                                                                                            | 18,382 | 20,965 | 22,327 | 23,078 | 24,846 | 29,597 | NA     | 23,461 | NA     | 17,814
|2000's                                                                                                                            | 17,677 | 19,848 | 20,596 | 21,963 | 21,486 | 20,944 | 21,140 | 20,274 | 21,951 | 21,191
|2010's                                                                                                                            | 22,702 | --     | --     | --     | --     | --     | --     | --     | --     | --    
|2020's                                                                                                                            | --     | --     | --     | --     | --     |        |        |        |        |       
|- = 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