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Download Data (XLS File) |
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| West Coast (PADD 5) Isobutane-Isobutylene Stocks at Bulk Terminals (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 184 | 171 | 178 | 202 | 202 | 237 | 267 | 233 | 264 | 244 | 211 | 207 |
| 1994 | 173 | 160 | 162 | 160 | 137 | 157 | 182 | 198 | 209 | 206 | 186 | 166 |
| 1995 | 132 | 132 | 134 | 138 | 188 | 238 | 223 | 202 | 212 | 197 | 144 | 115 |
| 1996 | 103 | 41 | 15 | 28 | 30 | 43 | 36 | 71 | 72 | 74 | 48 | 24 |
| 1997 | 7 | 3 | 6 | 20 | 39 | 51 | 62 | 73 | 145 | 186 | 171 | 140 |
| 1998 | 85 | 42 | 54 | 19 | 28 | 63 | 38 | 117 | 126 | 102 | 76 | 39 |
| 1999 | 14 | 14 | 32 | 45 | 73 | 74 | 88 | 100 | 157 | 151 | 86 | 32 |
| 2000 | 3 | 1 | 1 | 11 | 28 | 53 | 77 | 98 | 52 | 69 | 59 | 41 |
| 2001 | 3 | 2 | 2 | 17 | 28 | 49 | 145 | 137 | 55 | 56 | 48 | 12 |
| 2002 | 4 | 3 | 7 | 27 | 44 | 113 | 113 | 110 | 157 | 162 | 69 | 15 |
| 2003 | 5 | 4 | 5 | 11 | 16 | 70 | 88 | 123 | 135 | 147 | 115 | 79 |
| 2004 | 51 | 19 | 19 | 19 | 44 | 46 | 60 | 109 | 119 | 112 | 107 | 49 |
| 2005 | 3 | 1 | 1 | 12 | 27 | 62 | 42 | 56 | 119 | 119 | 104 | 77 |
| 2006 | 45 | 16 | 3 | 5 | 8 | 66 | 89 | 16 | 34 | 35 | 25 | 14 |
| 2007 | 4 | |||||||||||
| 2008 | 1 | 7 | 5 | 7 | 10 | 13 | 15 | 15 | 15 | 17 | 11 | |
| 2009 | 6 | 2 | 1 | |||||||||
| 2010 | 26 | 19 | 15 | 45 | 3 | 47 | 30 | 13 | 39 | 46 | 29 | 29 |
| 2011 | 24 | 19 | 30 | 35 | 16 | 37 | 73 | 21 | 25 | 16 | 31 | 19 |
| 2012 | 27 | 19 | 20 | 62 | 30 | 23 | 53 | 46 | 28 | 26 | 21 | 20 |
| 2013 | 5 | 25 | 27 | 20 | 4 | 50 | 24 | 13 | 22 | 18 | 16 | 16 |
| 2014 | 1 | 1 | 3 | 8 | 5 | 5 | 23 | 11 | 9 | 10 | 6 | 24 |
| 2015 | 4 | 26 | 10 | 18 | 17 | 13 | 21 | 23 | 5 | 6 | 2 | 5 |
| 2016 | 14 | 8 | 2 | 17 | 7 | 1 | 1 | |||||
| 2020 | 3 | 3 | 3 | 4 | ||||||||
| 2021 | 4 | 6 | 6 | 6 | 5 | 5 | ||||||
| 2024 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | ||
| 2025 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 4/30/2026 |
| Next Release Date: 5/29/2026 |