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| Gulf Coast (PADD 3) Isobutane-Isobutylene Stocks at Bulk Terminals (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 4,732 | 4,475 | 4,215 | 3,995 | 5,395 | 5,971 | 5,694 | 4,990 | 5,526 | 5,547 | 4,720 | 4,239 |
| 1994 | 4,205 | 4,561 | 4,391 | 4,152 | 4,237 | 4,321 | 2,784 | 2,949 | 3,925 | 4,099 | 3,748 | 2,885 |
| 1995 | 3,135 | 2,701 | 2,028 | 2,537 | 3,274 | 3,062 | 3,894 | 3,690 | 2,120 | 2,024 | 1,915 | 1,742 |
| 1996 | 1,542 | 1,474 | 1,839 | 1,865 | 1,691 | 2,162 | 2,939 | 3,247 | 2,945 | 3,297 | 2,580 | 2,537 |
| 1997 | 2,473 | 1,754 | 1,824 | 1,955 | 2,354 | 2,224 | 2,852 | 3,181 | 3,179 | 2,984 | 2,579 | 2,525 |
| 1998 | 2,830 | 2,549 | 2,907 | 2,737 | 3,114 | 2,817 | 2,546 | 2,469 | 2,586 | 2,542 | 2,393 | 1,756 |
| 1999 | 1,714 | 1,690 | 1,813 | 2,318 | 2,517 | 2,600 | 2,213 | 2,127 | 2,044 | 2,052 | 1,702 | 1,632 |
| 2000 | 1,403 | 1,236 | 1,231 | 1,269 | 1,344 | 1,975 | 2,484 | 2,288 | 1,973 | 1,443 | 1,390 | 1,355 |
| 2001 | 1,400 | 1,487 | 1,739 | 1,635 | 2,433 | 2,286 | 1,599 | 1,928 | 1,533 | 1,655 | 1,544 | 1,367 |
| 2002 | 1,557 | 2,033 | 2,240 | 2,394 | 2,368 | 1,959 | 1,557 | 1,608 | 1,550 | 1,879 | 1,743 | 1,537 |
| 2003 | 1,158 | 1,030 | 972 | 1,111 | 1,469 | 1,910 | 1,947 | 1,735 | 2,114 | 2,767 | 1,567 | 1,285 |
| 2004 | 1,166 | 1,091 | 1,427 | 1,287 | 1,088 | 894 | 1,511 | 1,632 | 1,612 | 1,226 | 1,167 | 1,098 |
| 2005 | 1,341 | 1,591 | 1,360 | 1,825 | 2,204 | 1,535 | 1,664 | 2,116 | 1,893 | 2,094 | 2,132 | 1,700 |
| 2006 | 1,492 | 1,849 | 1,996 | 2,200 | 2,867 | 2,355 | 1,845 | 1,660 | 1,926 | 2,115 | 1,976 | 1,126 |
| 2007 | 1,357 | 1,760 | 2,110 | 2,745 | 2,992 | 2,796 | 2,735 | 2,637 | 2,356 | 2,760 | 2,409 | 1,677 |
| 2008 | 1,630 | 1,977 | 2,122 | 2,847 | 3,083 | 2,871 | 2,612 | 3,073 | 3,639 | 2,890 | 2,089 | 1,918 |
| 2009 | 1,978 | 2,314 | 2,347 | 2,072 | 2,374 | 2,215 | 2,154 | 1,817 | 1,881 | 2,434 | 2,019 | 1,987 |
| 2010 | 1,996 | 2,186 | 2,038 | 1,606 | 1,937 | 2,373 | 2,662 | 2,939 | 3,381 | 3,519 | 2,404 | 2,252 |
| 2011 | 2,235 | 1,791 | 2,124 | 2,217 | 2,721 | 2,848 | 2,640 | 2,092 | 1,823 | 1,779 | 2,105 | 2,401 |
| 2012 | 2,367 | 2,219 | 2,800 | 3,176 | 2,756 | 2,763 | 3,103 | 3,049 | 2,955 | 3,161 | 3,268 | 2,722 |
| 2013 | 2,627 | 2,987 | 3,521 | 4,536 | 4,844 | 4,482 | 4,751 | 4,840 | 5,282 | 3,547 | 3,297 | 3,120 |
| 2014 | 2,662 | 2,574 | 2,469 | 2,405 | 2,166 | 2,586 | 3,085 | 4,154 | 4,212 | 4,017 | 3,959 | 3,783 |
| 2015 | 3,202 | 2,739 | 3,040 | 3,268 | 4,061 | 4,108 | 4,491 | 4,060 | 4,287 | 4,419 | 4,208 | 3,690 |
| 2016 | 3,285 | 3,721 | 3,967 | 3,605 | 3,492 | 3,237 | 2,824 | 3,040 | 3,048 | 2,935 | 2,289 | 2,781 |
| 2017 | 2,271 | 2,618 | 3,034 | 3,351 | 3,651 | 3,890 | 3,225 | 3,221 | 4,596 | 4,528 | 3,633 | 2,816 |
| 2018 | 2,831 | 2,660 | 3,160 | 3,508 | 2,978 | 3,509 | 3,964 | 3,963 | 4,344 | 3,995 | 3,551 | 3,394 |
| 2019 | 3,619 | 3,677 | 4,302 | 5,209 | 5,432 | 5,118 | 5,173 | 5,504 | 5,468 | 5,390 | 5,508 | 5,678 |
| 2020 | 4,799 | 5,738 | 6,733 | 7,942 | 7,583 | 6,462 | 6,649 | 7,513 | 7,631 | 7,484 | 7,531 | 7,138 |
| 2021 | 5,751 | 5,765 | 5,755 | 5,732 | 4,375 | 4,264 | 4,901 | 5,079 | 5,029 | 6,384 | 6,046 | 4,112 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2025 | -- | |||||||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 3/31/2025 |
| Next Release Date: 4/30/2025 |