View History:    Monthly     Annual   
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U.S. Isobutane-Isobutylene Stocks at Refineries (Thousand Barrels)
U.S. Isobutane-Isobutylene Stocks at Refineries (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1993 2,780 2,771 3,058 3,309 3,655 3,510 3,282 3,604 3,503 3,111 2,954 2,903
  1994 2,805 2,772 2,699 2,655 2,499 2,459 2,723 2,992 3,056 2,871 2,899 2,830
  1995 2,494 2,398 2,821 2,608 2,645 2,714 2,759 2,519 2,534 2,750 2,671 2,513
  1996 2,526 2,566 2,620 2,847 2,681 3,071 2,972 2,897 3,001 3,078 2,745 2,467
  1997 2,463 2,360 2,395 2,727 2,993 3,166 3,305 3,513 3,630 3,382 2,917 2,899
  1998 3,010 2,819 3,006 3,222 3,065 3,159 3,260 3,242 2,856 2,990 2,819 2,903
  1999 2,699 2,844 2,777 2,697 2,432 2,333 2,783 2,527 2,434 2,362 2,413 2,238
  2000 2,062 2,141 2,035 2,073 2,355 2,606 2,738 2,717 2,428 2,328 2,122 1,959
  2001 1,907 1,985 2,179 2,038 2,262 2,281 2,407 2,446 2,696 2,553 2,289 2,012
  2002 1,856 2,090 2,365 2,532 2,401 2,427 2,488 2,213 2,554 2,263 2,082 2,022
  2003 2,088 2,362 2,374 2,423 2,067 2,399 2,290 2,199 2,484 2,372 2,564 2,118
  2004 2,264 2,129 2,139 2,387 2,447 2,243 2,222 2,217 2,308 2,038 2,218 2,270
  2005 2,419 2,515 2,558 2,710 2,265 2,121 1,981 1,906 1,786 2,172 2,281 2,037
  2006 2,191 2,139 2,498 2,543 2,877 2,201 2,063 2,256 2,181 1,988 2,103 2,279
  2007 2,328 2,468 2,519 2,495 2,732 2,626 2,651 2,756 3,069 3,115 2,780 2,690
  2008 2,872 2,718 3,009 2,737 2,784 2,817 2,811 2,638 2,575 2,496 2,325 2,496
  2009 2,808 2,967 2,952 2,796 2,554 2,609 2,366 2,551 2,351 2,456 2,229 2,438
  2010 2,628 2,500 2,346 2,229 2,426 2,443 2,403 2,333 2,582 2,496 2,696 2,580
  2011 2,606 2,692 2,718 2,681 2,686 2,426 2,343 2,290 2,350 2,190 2,480 2,325
  2012 2,583 2,618 2,596 2,645 2,634 2,454 2,669 2,403 2,486 2,602 2,588 2,584
  2013 2,689 2,714

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 4/29/2013
Next Release Date: Last Week of May 2013

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