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| Gulf Coast (PADD 3) Ending Stocks of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 6,642 | 6,913 | 6,984 | 7,330 | 7,373 | 7,018 | 7,018 | 6,987 | 6,553 | 6,968 | 7,019 | 6,660 |
| 1982 | 5,689 | 5,843 | 5,072 | 4,747 | 5,615 | 5,703 | 6,116 | 6,287 | 6,945 | 6,955 | 6,891 | 5,972 |
| 1983 | 4,462 | 4,893 | 5,242 | 5,935 | 6,355 | 7,883 | 7,623 | 7,368 | 6,919 | 8,049 | 7,966 | 7,418 |
| 1984 | 7,037 | 7,173 | 6,714 | 6,475 | 6,529 | 7,356 | 7,076 | 6,894 | 6,830 | 7,110 | 6,542 | 6,503 |
| 1985 | 6,028 | 5,173 | 5,904 | 5,501 | 5,659 | 5,844 | 5,660 | 5,503 | 5,198 | 5,496 | 5,034 | 5,082 |
| 1986 | 4,668 | 4,840 | 5,081 | 5,258 | 5,461 | 6,361 | 7,188 | 8,255 | 7,944 | 7,541 | 7,460 | 6,132 |
| 1987 | 5,642 | 4,876 | 4,701 | 5,224 | 6,353 | 4,917 | 4,685 | 5,327 | 6,926 | 7,347 | 7,201 | 7,327 |
| 1988 | 6,455 | 6,056 | 6,097 | 6,195 | 6,286 | 6,808 | 6,826 | 7,295 | 6,897 | 6,926 | 6,421 | 5,197 |
| 1989 | 4,789 | 5,411 | 6,282 | 6,394 | 6,528 | 5,785 | 5,771 | 5,534 | 5,789 | 5,791 | 5,409 | 5,210 |
| 1990 | 3,758 | 4,795 | 5,300 | 5,572 | 6,080 | 6,615 | 6,453 | 7,380 | 7,595 | 8,042 | 7,471 | 6,700 |
| 1991 | 6,019 | 6,080 | 5,556 | 5,556 | 5,869 | 6,341 | 5,844 | 6,750 | 6,333 | 6,438 | 5,784 | 4,909 |
| 1992 | 7,182 | 5,047 | 5,271 | 5,344 | 5,509 | 4,621 | 4,505 | 5,887 | 6,927 | 7,577 | 7,735 | 7,335 |
| 1993 | 7,364 | 7,163 | 7,092 | 7,171 | 9,098 | 9,501 | 9,759 | 9,052 | 9,078 | 8,506 | 7,405 | 6,790 |
| 1994 | 6,664 | 6,873 | 6,800 | 6,619 | 6,531 | 6,649 | 5,281 | 5,542 | 6,717 | 6,729 | 6,495 | 5,290 |
| 1995 | 5,378 | 4,793 | 4,581 | 5,182 | 5,772 | 5,723 | 6,358 | 6,039 | 4,825 | 4,617 | 4,458 | 4,183 |
| 1996 | 3,994 | 3,857 | 4,305 | 4,410 | 4,267 | 4,978 | 5,729 | 6,014 | 5,496 | 6,039 | 4,934 | 4,986 |
| 1997 | 4,602 | 3,774 | 3,967 | 4,393 | 4,663 | 4,806 | 5,598 | 6,118 | 6,151 | 5,791 | 5,232 | 5,104 |
| 1998 | 5,801 | 5,197 | 5,666 | 5,592 | 6,071 | 5,922 | 5,573 | 5,532 | 5,408 | 5,234 | 5,131 | 4,777 |
| 1999 | 4,728 | 4,846 | 4,929 | 5,221 | 5,345 | 5,406 | 4,917 | 4,590 | 4,354 | 4,705 | 4,262 | 3,800 |
| 2000 | 3,434 | 3,342 | 3,141 | 3,227 | 3,621 | 4,461 | 5,055 | 5,030 | 4,715 | 4,028 | 3,543 | 3,202 |
| 2001 | 3,397 | 3,701 | 4,145 | 3,994 | 5,025 | 4,851 | 4,276 | 4,981 | 5,060 | 4,773 | 4,410 | 3,742 |
| 2002 | 3,512 | 4,456 | 4,546 | 5,042 | 4,753 | 4,368 | 4,335 | 4,459 | 4,559 | 4,493 | 4,547 | 4,140 |
| 2003 | 3,415 | 3,360 | 2,963 | 3,189 | 3,702 | 3,920 | 3,982 | 4,054 | 4,455 | 5,564 | 4,429 | 3,604 |
| 2004 | 3,250 | 3,078 | 3,845 | 3,981 | 3,532 | 3,085 | 3,742 | 4,002 | 3,926 | 3,231 | 3,356 | 3,401 |
| 2005 | 3,732 | 3,985 | 3,714 | 4,240 | 4,554 | 3,855 | 4,023 | 4,610 | 4,135 | 4,568 | 4,709 | 3,963 |
| 2006 | 3,919 | 3,971 | 4,793 | 5,165 | 6,068 | 5,249 | 4,239 | 4,167 | 4,002 | 4,295 | 4,439 | 3,207 |
| 2007 | 3,564 | 3,970 | 3,832 | 4,443 | 4,876 | 4,813 | 4,516 | 4,299 | 4,605 | 5,512 | 4,585 | 3,642 |
| 2008 | 3,609 | 4,215 | 4,493 | 4,915 | 5,352 | 5,276 | 5,012 | 5,540 | 5,726 | 4,963 | 4,062 | 4,000 |
| 2009 | 4,217 | 4,744 | 4,454 | 4,283 | 4,246 | 4,027 | 4,093 | 3,975 | 3,871 | 4,460 | 3,909 | 4,160 |
| 2010 | 3,929 | 3,845 | 3,745 | 3,656 | 3,979 | 4,350 | 4,784 | 4,947 | 5,772 | 5,782 | 4,441 | 4,136 |
| 2011 | 4,114 | 3,926 | 4,162 | 4,260 | 4,725 | 4,575 | 4,244 | 3,762 | 3,517 | 3,438 | 3,755 | 4,094 |
| 2012 | 4,802 | 4,421 | 4,699 | 5,118 | 4,841 | 4,629 | 5,132 | 5,095 | 5,404 | 5,365 | 5,701 | 5,236 |
| 2013 | 5,125 | 5,314 | 5,778 | 6,729 | 7,091 | 7,036 | 7,057 | 6,995 | 7,572 | 5,694 | 5,492 | 5,280 |
| 2014 | 4,548 | 4,721 | 4,400 | 4,530 | 4,285 | 4,791 | 5,175 | 6,204 | 6,308 | 6,191 | 6,008 | 5,913 |
| 2015 | 5,633 | 5,321 | 5,646 | 5,924 | 6,301 | 6,066 | 6,438 | 6,104 | 6,247 | 6,597 | 6,243 | 5,703 |
| 2016 | 5,371 | 6,002 | 6,062 | 5,856 | 5,363 | 5,412 | 5,035 | 5,288 | 4,995 | 5,212 | 4,757 | 5,340 |
| 2017 | 5,299 | 5,959 | 6,294 | 6,234 | 6,259 | 6,089 | 5,444 | 6,038 | 7,031 | 7,085 | 6,027 | 5,371 |
| 2018 | 5,584 | 5,031 | 5,647 | 5,845 | 5,310 | 5,740 | 6,355 | 6,450 | 6,899 | 6,310 | 5,845 | 5,711 |
| 2019 | 5,958 | 6,442 | 7,044 | 7,834 | 7,935 | 7,889 | 7,849 | 7,967 | 8,063 | 8,273 | 8,178 | 8,484 |
| 2020 | 7,777 | 8,858 | 9,667 | 11,114 | 10,420 | 9,151 | 9,098 | 9,949 | 10,344 | 10,310 | 9,444 | 9,425 |
| 2021 | 7,913 | 7,884 | 7,936 | 8,135 | 6,770 | 6,959 | 7,420 | 7,452 | 7,307 | 8,598 | 8,449 | 6,430 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | |||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 9/29/2023 |
| Next Release Date: 10/31/2023 |