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Rocky Mountain (PADD IV) Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels per Day)
Rocky Mountain (PADD IV) Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels per Day)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 -1 0 0 0 0 0 0 0 0 0 0 0
  1982 0 0 0 -1 0 0 0 0 0 0 0 0
  1983 0 0 0 0 0 0 0 0 0 0 0 0
  1984 0 0 0 1 0 0 1 0 0 0 0 0
  1985 0 0 0 1 1 0 0 0 0 0 0 1
  1986 0 0 -1 0 1 0 0 0 1 0 -1 0
  1987 0 0 0 -1 -1 -1 -1 0 -1 0 1 0
  1988 0 0 -1 0 -1 0 1 -1 0 0 0 -1
  1989 0 -1 0 0 -1 -2 -2 -2 -1 1 -2 0
  1990 -1 0 2 -2 -1 0 0 0 0 -1 -1 0
  1991 -1 0 -1 0 0 -1 0 0 0 0 0 1
  1992 1 -1 1 0 0 -1 -1 -2 -2 -1 0 0
  1993 0 -1 1 -1 -2 -1 0 0 0 -1 1 -1
  1994 -1 1 1 0 -1 -1 -2 -2 0 -2 -1
  1995 0 -1 0 -2 -2 -2 -2 -1 -1 -2 -1 0
  1996 -2 -1 0 1 -3 -1 -1 -3 -1 -1 -2 -2
  1997 -1 -2 -1 -2 -1 -1 -3 -1 -1 -2 -2 -2
  1998 -3 -2 -1 -3 -4 -4 -4 -4 -3 -3 -1 -1
  1999 0 -1 -2 -2 -2 -2 -1 -2 -1 -1 -1 -1
  2000 -2 -2 -1 -1 -2 -2 -2 -1 -2 -1 -1 0
  2001 0 0 -1 -3 -2 -1 -1 -3 -1 0 0 -1
  2002 -2 -1 -1 -1 -2 -3 -3 -2 -1 -2 -2 -3
  2003 -2 -1 -1 -1 -4 -1 -2 -2 -2 -2 -2 -2
  2004 -1 -2 -1 -2 -2 -2 -2 -2 -2 -2 -3 -1
  2005 -1 -1 -2 -2 -2 -3 -3 -2 -2 -3 -2 -2
  2006 0 0 -1 -1 -1 -1 -1 0 -2 -1 0 -1
  2007 -1 0 1 0 -1 -1 0 0 -1 -2 0 -1
  2008 -1 -1 0 -1 1 0

Release Date: 8/26/2008
Next Release Date: Last Week of September 2008

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