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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 Field Production (Thousand Barrels per Day)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
0
0
1
1
1
1
1
1
1
1
1
1
1982
1
1
1
1
1
1
1
1
1
1
1
1
1983
1
1
1
1
1
1
1
1
1
1
1
1
1984
2
2
2
2
1
2
1
2
2
2
2
2
1985
2
2
2
2
1
2
2
2
2
2
2
1
1986
2
2
2
2
2
1
1
1
1
1
1
2
1987
2
2
2
2
1
1
1
1
1
1
1
2
1988
1
2
2
1
2
1
1
1
1
1
1
1
1989
2
2
2
2
1
1
1
2
2
2
2
2
1990
1
2
1
1
1
1
1
1
1
1
1
2
1991
2
1
1
1
1
1
1
1
1
1
1
2
1992
2
2
1
1
1
1
1
1
1
1
1
1
1993
1
2
2
1
1
1
1
1
1
1
1
1
1994
1
1
1
1
1
1
1
1
1
1
1
1
1995
1
1
1
1
1
1
1
1
1
1
1
1
1996
1
1
1
1
1
1
1
1
1
1
1
1
1997
1
1
1
1
1
1
1
1
1
1
1
1
1998
1
1
1
1
1
1
1
1
1
1
1
1
1999
1
2
1
1
1
1
1
1
1
1
1
1
2000
1
1
1
1
1
1
1
1
1
1
1
1
2001
1
1
1
1
1
1
1
1
1
1
1
1
2002
1
1
1
1
1
1
1
1
1
1
1
1
2003
1
1
1
1
1
1
1
1
1
1
1
1
2004
1
1
1
1
2
2
1
2
2
2
2
2
2005
2
2
2
2
2
1
1
1
1
1
1
1
2006
2
2
2
2
2
2
2
2
2
2
2
2
2007
2
3
2
2
2
2
2
2
2
2
2
2
2008
2
2
2
2
Updated on 6/26/2008
Source: U.S. Energy Information Administration
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