Home
>
Petroleum
>
Navigator
Energy Glossary
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
Contact Us
·
Feedback
·
Privacy/Security
·
Jobs
·
About Us