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Midwest (PADD 2) Ending Stocks of Isobutane-Isobutylene (Thousand Barrels)
Midwest (PADD 2) Ending Stocks of Isobutane-Isobutylene (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 2,570 2,479 2,264 2,397 2,217 2,237 2,248 1,980 2,125 1,678 1,586 1,637
  1982 1,984 2,085 2,216 2,109 1,711 1,532 1,431 1,645 1,591 2,076 2,234 2,140
  1983 2,419 2,054 2,017 2,266 2,370 2,493 2,917 2,621 2,816 2,518 2,266 1,961
  1984 2,244 2,429 2,440 2,399 2,330 2,276 2,052 1,993 2,138 2,114 2,093 2,139
  1985 2,213 2,097 1,589 1,659 1,706 1,578 1,469 1,435 1,357 1,491 1,837 1,936
  1986 1,902 1,787 1,610 1,975 1,864 1,966 1,882 1,790 2,001 2,039 2,326 2,040
  1987 1,839 1,680 1,645 1,390 1,548 1,704 1,923 1,928 2,113 2,308 2,479 2,637
  1988 2,399 2,135 2,070 2,456 2,164 2,066 2,475 2,398 2,496 2,450 2,511 2,270
  1989 2,135 1,864 1,911 1,841 2,134 2,285 2,393 2,601 2,637 2,615 2,836 2,403
  1990 2,383 2,089 2,094 2,211 2,677 2,838 2,954 2,784 3,150 2,608 2,746 2,479
  1991 2,367 2,290 2,653 2,264 2,101 2,238 2,348 2,320 2,609 2,657 2,576 2,512
  1992 2,466 2,624 2,680 2,796 2,666 2,633 2,513 2,320 2,746 2,917 2,905 2,795
  1993 2,496 2,553 2,855 3,226 3,070 3,037 3,223 3,332 3,553 3,166 2,647 2,476
  1994 2,583 2,803 3,098 2,771 2,391 2,247 2,726 3,401 3,384 2,694 1,911 1,907
  1995 1,767 1,792 2,056 2,145 2,232 2,457 2,374 2,918 3,154 3,035 2,188 2,169
  1996 1,774 1,629 1,678 1,804 2,085 2,044 2,347 2,542 2,386 2,181 2,147 2,005
  1997 1,784 1,513 1,431 1,814 2,230 2,449 2,373 2,352 2,437 2,085 2,013 1,993
  1998 1,686 2,157 2,127 2,218 2,048 2,229 2,201 2,707 2,871 2,076 1,828 1,736
  1999 1,678 1,527 1,387 1,444 1,679 1,748 1,922 1,934 1,822 1,737 1,817 1,615
  2000 1,590 1,433 1,598 1,667 1,615 1,681 1,852 2,114 2,047 1,919 1,774 1,779
  2001 1,541 1,357 1,422 1,583 1,655 1,739 1,965 1,983 1,985 1,697 1,458 1,438
  2002 1,521 1,566 1,446 1,553 1,846 1,840 1,835 2,094 2,093 1,907 1,698 1,611
  2003 1,858 1,743 1,787 1,538 1,423 1,811 1,946 1,971 2,099 2,063 2,060 1,658
  2004 1,558 1,467 1,952 1,945 1,922 1,990 2,092 2,237 2,667 1,691 1,765 1,752
  2005 1,642 1,705 1,874 1,756 1,848 1,895 2,040 2,145 1,925 1,861 1,687 1,838
  2006 1,757 1,740 1,861 2,080 2,094 2,246 2,346 2,472 2,500 2,525 2,482 2,287
  2007 1,999 2,134 2,275 2,322 2,537 2,765 3,030 2,955 3,106 3,018 2,631 2,268
  2008 2,098 1,831 2,003 2,005 1,988 2,145 2,412 2,513 2,372 2,278 2,358 2,156
  2009 2,174 2,014 1,809 1,882 1,850 1,790 1,924 1,919 2,041 1,951 2,059 1,826
  2010 1,911 2,207 2,319 2,130 2,242 2,036 1,921 1,789 1,767 2,225 2,406 1,998
  2011 1,699 1,722 1,924 1,934 2,025 1,950 1,616 1,538 1,654 1,845 1,855 2,066
  2012 2,095 2,438 2,502 2,346 2,531 2,233 1,861 1,818 1,768 2,261 2,350 2,353
  2013 2,278 2,221 1,993 2,284 2,415 1,895 1,909 2,053 1,872 2,087 1,934 1,651
  2014 1,953 1,656 1,950 2,014 2,459 2,659


- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 9/2/2014
Next Release Date: Last Week of September 2014

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