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Note: These data are available in spreadsheet format by clicking the ''Download Series History'' link on the previous page (with drop-down menu bar at top).
 View History:    Monthly     Annual   
West Coast (PADD 5) Isobutane-Isobutylene Product Supplied (Thousand Barrels per Day)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1989 -2 2 4 -8 2 -2 0 -4 1 -3 -3 -4
  1990 -10 -7 1 -2 -2 -1 -4 -1 -4 -7 -10 -8
  1991 -4 1 2 1 -3 -5 -5 -6 -8 -12 -6 -5
  1992 -5 -6 -1 -1 0 -1 2 -2 0 -3 -5 -13
  1993 -4 -3 -5 -4 0 -4 -3 -2 0 -3 0 -4
  1994 1 -1 4 -1 1 0 -1 1 0 -4 1 -4
  1995 10 3 5 5 -2 -2 -1 3 -1 0 7 4
  1996 4 8 3 -2 1 -3 1 5 2 -2 1 5
  1997 13 6 5 7 6 8 9 6 7 3 4 5
  1998 2 7 5 11 8 13 12 6 9 5 -2 -5
  1999 -4 1 9 18 14 9 9 5 5 2 2 6
  2000 2 -7 0 6 8 11 9 6 10 5 2 2
  2001 -3 4 -1 -4 0 5 0 6 11 5 -2 4
  2002 -3 3 3 4 4 1 7 6 3 -1 5 2
  2003 -5 -4 -10 -3 -2 -3 1 -3 -1 -3 1 1
  2004 -2 1 -1 -5 -9 -4 -5 -5 -6 -1 -4 -2
  2005 -5 -11 -6 -3 -1 -4 -5 -11 -14 -7 -6 -4
  2006 -4 -9 -11 -7 -7 -8 -1 -2 -3 -6 -7 -8
  2007 -3 -9 -9 -11 -7 -5 -5 -3 -5 -2 -4 -5
  2008 -6 -2 -5 2

Updated on 6/26/2008
Source: U.S. Energy Information Administration
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