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U.S. Ending Stocks of Isobutane-Isobutylene (Thousand Barrels)
U.S. Ending Stocks of Isobutane-Isobutylene (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 9,578 9,748 9,487 9,939 9,796 9,666 9,767 9,464 9,215 9,113 9,109 8,738
  1982 8,080 8,270 7,596 7,064 7,452 7,378 7,662 8,059 8,671 9,191 9,254 8,298
  1983 7,044 7,095 7,434 8,409 8,896 10,601 10,879 10,220 10,002 10,910 10,539 9,719
  1984 9,705 9,933 9,423 9,150 9,206 9,971 9,553 9,318 9,328 9,563 8,962 8,987
  1985 8,573 7,621 7,873 7,508 7,743 7,782 7,518 7,273 6,850 7,312 7,074 7,313
  1986 6,826 6,877 7,186 7,907 7,913 8,750 9,628 10,473 10,358 9,982 10,159 8,526
  1987 7,823 6,898 6,749 6,962 8,231 6,995 7,029 7,707 9,493 10,135 10,208 10,499
  1988 9,424 8,720 8,681 9,057 8,795 9,240 9,719 10,145 10,613 10,284 9,664 8,031
  1989 7,571 7,883 8,650 8,872 9,322 8,739 8,905 8,898 9,176 9,119 8,858 8,070
  1990 6,773 7,486 8,042 8,419 9,488 10,102 10,177 10,946 11,582 11,449 10,923 9,798
  1991 9,080 9,086 8,997 8,543 8,749 9,405 8,986 9,954 9,823 9,758 8,977 8,035
  1992 10,360 8,364 8,805 8,966 9,145 8,086 7,799 8,961 10,546 11,341 11,358 10,781
  1993 10,587 10,427 10,817 11,455 13,342 13,708 14,109 13,390 13,615 12,677 10,970 10,237
  1994 10,027 10,480 10,818 10,258 9,837 9,837 9,202 10,166 11,209 10,404 9,340 8,043
  1995 7,956 7,363 7,551 8,114 8,774 9,010 9,643 9,863 8,941 8,607 7,573 7,201
  1996 6,549 6,268 6,666 7,221 7,109 8,016 8,961 9,452 8,934 9,297 7,898 7,694
  1997 7,071 6,143 6,068 6,971 7,975 8,521 9,190 9,506 9,823 9,173 8,417 8,156
  1998 8,492 8,300 8,903 8,854 9,030 9,253 8,917 9,366 9,265 8,329 7,730 7,268
  1999 7,046 7,242 7,146 7,536 7,802 7,803 8,074 7,565 7,218 7,339 6,862 6,185
  2000 5,630 5,614 5,460 5,651 6,040 7,131 8,109 8,184 7,634 6,813 6,116 5,851
  2001 5,704 5,787 6,395 6,372 7,642 7,616 7,244 7,880 7,904 7,335 6,712 5,940
  2002 5,801 6,806 7,097 7,808 7,788 7,399 7,258 7,512 7,571 7,507 7,128 6,545
  2003 6,164 6,043 5,686 5,887 6,134 7,003 6,862 6,957 7,632 8,710 7,567 6,177
  2004 5,797 5,476 6,695 6,856 6,565 6,124 6,811 7,316 7,774 5,877 6,090 6,112
  2005 6,384 6,729 6,498 7,205 7,442 6,735 6,959 7,736 7,080 7,667 7,479 6,592
  2006 6,642 6,747 7,620 8,221 9,441 8,737 7,758 7,683 7,480 7,577 7,773 6,372
  2007 6,361 6,968 7,177 7,965 8,662 8,634 8,700 8,366 8,911 9,468 8,155 6,854
  2008 6,930 7,026 7,737 8,155 8,514 8,453 8,300 8,929 9,095 8,156 7,128 7,104
  2009 7,352 7,984 7,389 7,165 7,238 6,997 6,928 7,048 6,849 7,368 6,896 6,888
  2010 6,985 7,270 7,006 6,845 7,277 7,553 7,767 7,722 8,556 9,041 7,891 7,056
  2011 6,784 6,694 7,147 7,439 7,903 7,642 7,028 6,337 6,145 6,169 6,633 7,129
  2012 7,975 7,935 8,336 8,752 8,520 7,986 8,273 7,921 8,320 8,797 9,139 8,568
  2013 8,563 8,859 9,005 10,103 10,632 10,051 9,944 9,975 10,538 8,838 8,463 7,771
  2014 7,376 7,492 7,619 7,753 7,804 8,706 8,733 9,486 9,286 9,461 9,078 8,717
  2015 8,595 8,529 9,243 9,541 9,721 9,733 10,151 9,541 9,537 9,536 9,217 8,633
  2016 8,260 8,997 9,230 8,992 8,877 8,856 8,581 8,753 8,320 8,257 7,735 8,130
  2017 8,088 8,822 9,068 9,209 9,249 9,044 8,652 9,110 10,291 10,612 9,413 8,428
  2018 8,490 8,010 8,513 8,537 8,296 8,712 9,669 9,719 10,086 9,085 8,688 8,672
  2019 9,482 9,870 10,371 11,298 11,789 11,616 11,414 11,214 11,120 11,128 11,107 11,237
  2020 10,684 11,657 12,877 14,531 13,395 12,365 12,293 13,340 14,087 13,563 12,303 12,348
  2021 11,083 10,889 10,989 11,240 9,959 10,085 10,589 10,461 10,553 11,826 11,868 9,719
  2022 -- -- -- -- -- -- -- -- -- -- -- --
  2023 -- -- -- -- -- -- -- -- -- -- -- --
  2024 -- -- -- -- -- -- -- -- --

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 11/29/2024
Next Release Date: 12/31/2024

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