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| Refining District Indiana-Illinois-Kentucky Refinery Stocks of Normal Butylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 26 | 28 | 64 | 67 | 25 | 49 | 45 | 27 | 36 | 52 | 16 | 60 |
| 2011 | 35 | 64 | 105 | 72 | 25 | 16 | 24 | 33 | 12 | 0 | 2 | 13 |
| 2012 | 14 | 21 | 40 | 64 | 57 | 46 | 35 | 63 | 42 | 222 | 230 | 1 |
| 2013 | 0 | 0 | 73 | 58 | 69 | 29 | 40 | 44 | 55 | 50 | 207 | 12 |
| 2014 | 15 | 17 | 57 | 62 | 65 | 63 | 73 | 77 | 54 | 42 | 60 | 54 |
| 2015 | 65 | 121 | 74 | 68 | 51 | 29 | 59 | 64 | 68 | 76 | 68 | 10 |
| 2016 | 140 | 219 | 116 | 114 | 71 | 77 | 91 | 109 | 151 | 179 | 76 | 57 |
| 2017 | 12 | 46 | 37 | 46 | 40 | 138 | 61 | 79 | 704 | 866 | 86 | 115 |
| 2018 | 95 | 160 | 125 | 132 | 28 | 38 | 36 | 30 | 32 | 21 | 90 | 0 |
| 2019 | 1 | 0 | 21 | 43 | 46 | 118 | 104 | 47 | 256 | 74 | 17 | 14 |
| 2020 | 19 | 48 | 17 | 29 | 24 | 31 | 262 | 420 | 553 | 218 | 43 | 42 |
| 2021 | 15 | 31 | 46 | 117 | 149 | 61 | 100 | 254 | 934 | 98 | 765 | 107 |
| 2022 | 50 | 89 | 22 | 33 | 84 | 128 | 139 | 100 | 658 | 40 | 18 | 1 |
| 2023 | 3 | 0 | 31 | 38 | 60 | 81 | 32 | 80 | 48 | 65 | 28 | 31 |
| 2024 | 117 | 19 | 22 | 32 | 40 | 23 | 31 | 38 | 58 | 28 | 49 | 43 |
| 2025 | 54 | 47 | 59 | 42 | 36 | 37 | 61 | 68 | 88 | 21 | 36 | |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 2/6/2026 |
| Next Release Date: 2/27/2026 |