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Rocky Mountain (PADD 4) Isobutane-Isobutylene Stock Change (Thousand Barrels per Day)
Rocky Mountain (PADD 4) Isobutane-Isobutylene Stock Change (Thousand Barrels per Day)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 1 1 0 0 0 0 1 0 0 0 0 1
  1982 0 -1 0 0 0 0 0 0 0 0 0 0
  1983 -1 1 0 0 0 0 0 0 0 0 -1 1
  1984 0 -1 0 0 0 0 1 0 0 0 -1 0
  1985 0 1 -1 0 0 0 0 0 -1 0 0 0
  1986 0 1 0 1 -1 0 2 -1 1 0 0 -1
  1987 0 1 0 -1 -1 1 0 0 0 0 0 0
  1988 1 0 0 -1 0 0 0 0 2 0 -1 -1
  1989 1 0 0 -1 0 -1 1 0 0 2 -1 0
  1990 0 0 1 -1 0 0 0 0 0 0 0 -1
  1991 0 0 0 1 0 0 0 0 1 -1 0 1
  1992 1 0 0 0 1 -3 1 -1 2 1 0 -1
  1993 -1 0 1 1 0 0 -2 0 0 0 1 0
  1994 -2 1 2 0 -1 0 0 -1 1 1 -2 -1
  1995 0 0 1 -1 0 0 0 0 1 -1 0 2
  1996 -1 0 1 2 -1 -1 0 -1 1 0 -1 0
  1997 0 -1 1 0 0 0 -1 1 1 0 -1 -1
  1998 1 1 0 -1 -1 1 1 0 0 0 0 0
  1999 0 0 -1 0 -1 0 1 -1 -1 0 4
  2000 -1 1 0 -1 1 0 -1 0 0 0 -1 0
  2001 1 0 0 -1 0 1 0 -2 0 -1 0 0
  2002 0 1 2 -1 0 -1 1 0 0 0 0 0
  2003 2 1 0 -2 -1 0 0 0 0 -1 0 0
  2004 0 0 1 -2 0 1 0 0 1 -1 0 0
  2005 0 0 1 -1 1 0 -1 1 0 -1 0 0
  2006 0 0 -1 1 0 0 -1 0 0 0 0 -2
  2007 0 0 1 -1 0 0 1 0 1 -1 0 0
  2008 0 0 0 0 0 0 0 0 0 0 -1 0
  2009 0 0 -1 1 0 -1 0 0 0 0 1 -1
  2010 0 0 0 -1 2 -1 0 1 -1 0 0 0
  2011 0 0 1 0 0 0 -1 0 -1 1 0 0
  2012 0 0 0 0 0 0 -1 -1 1 0 1 -2
  2013 1 1 -2 1 0 0 0 0 1 0 -1 0
  2014 1 -1 2 -1 0 0


- = 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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