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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   
East Coast (PADD 1) Isobutane-Isobutylene Stock Change (Thousand Barrels per Day)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 -1 0 -1 0 -1 1 -1 0 0 0 0 0
  1982 0 0 0 0 0 0 0 0 0 0 0 0
  1983 -1 0 0 1 -1 0 0 0 0 3 0 -1
  1984 -1 0 -1 1 -1 0 1 0 -1 0 0 0
  1985 0 0 1 1 0 -1 0 0 0 0 -1 -1
  1986 2 -1 0 1 1 -1 -1 0 -1 2 -2 1
  1987 1 -1 2 -1 -2 0 1 -1 -1 1 0 1
  1988 -1 1 0 0 1 0 0 0 0 1 0 0
  1989 0 -1 0 1 0 0 0 -1 0 1 0 -1
  1990 3 0 2 0 0 -2 1 2 1 0 0 -1
  1991 -1 0 0 1 0 0 0 1 0 -3 0 0
  1992 -1 -1 6 0 0 -4 -1 -1 1 -1 -1 -1
  1993 1 0 0 5 1 -2 0 -3 0 1 -2 -1
  1994 0 1 2 -2 3 -1 5 -1 -1 -3 1 -1
  1995 -1 -1 1 0 -1 1 0 -1 -1 3 0 0
  1996 0 -1 -1 3 0 2 0 -1 0 -1 -2 0
  1997 0 3 -6 3 9 3 -2 -4 1 0 0 1
  1998 -2 -7 7 2 -3 1 0 2 -4 -2 -3 1
  1999 -2 4 -1 1 -1 -3 12 -2 -2 -3 -3 2
  2000 -1 3 -4 -1 2 4 0 -2 0 -1 -3 1
  2001 0 2 -2 -1 2 3 -2 1 -2 0 -1 0
  2002 3 0 4 3 -1 -1 -5 -1 1 -1 1
  2003 1 -1 -4 6 0 5 -8 -3 0 0 1 -1
  2004 3 2 0 2 3 -3 -2 1 -2 -2 -2
  2005 2 -1 -1 9 -2 -5 0 -1 -3 8 -3 -4
  2006 2 -1 -2 -1 7 -3 0 -1 -2 -1 0 2
  2007 1 -4 4 1 0 -3 4 -1 2 -4 -1 1
  2008 -1 -2 4 4


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