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View History:
Monthly
Annual
Download Data (XLS File)
U.S. 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
4
3
3
4
4
4
3
4
1
0
0
1
1982
0
0
0
0
0
0
-1
-1
-1
4
-1
1
1983
1
0
1
1
2
0
3
0
0
2
2
2
1984
0
0
-1
-1
-1
-1
0
-1
-1
3
3
2
1985
-1
-2
0
-2
0
-1
2
0
-1
-3
0
0
1986
11
1
7
-6
7
10
7
3
11
1
5
0
1987
9
12
9
7
8
12
10
15
16
14
10
7
1988
8
8
20
16
18
15
19
13
16
10
9
5
1989
14
7
14
17
20
15
16
13
16
15
10
4
1990
7
13
10
10
13
9
16
12
18
10
4
9
1991
7
5
9
1
6
4
9
10
4
-7
2
2
1992
5
16
15
16
18
6
9
12
10
13
3
-2
1993
7
11
12
11
24
16
16
17
10
6
8
11
1994
13
10
16
9
8
18
21
27
6
6
7
13
1995
-4
2
21
20
10
14
26
20
9
18
11
3
1996
9
8
17
14
7
27
15
10
22
11
-4
-2
1997
11
5
5
17
19
12
19
12
18
9
3
7
1998
11
7
10
28
10
24
20
11
10
8
-2
4
1999
9
13
1
21
17
13
25
-1
7
1
-7
-1
2000
0
2
3
7
9
16
22
11
1
4
-5
-2
2001
7
3
3
3
14
-1
-1
4
1
-12
-20
-19
2002
-10
1
5
0
3
5
8
1
6
-21
-21
-5
2003
-19
-4
-10
-10
-20
4
-15
-14
0
-12
-7
-11
2004
-16
-21
-22
-9
-22
-25
-25
-20
-16
-24
-14
-13
2005
-18
-31
-38
-30
-43
-42
-33
-29
-34
-28
-11
-27
2006
0
-1
-2
-5
14
-10
-3
4
-3
-1
-6
1
2007
12
23
14
2
12
3
12
2
4
3
-8
-9
2008
0
3
18
16
8
8
Release Date: 8/26/2008
Next Release Date: Last Week of September 2008
Referring Pages:
Isobutane/Isobutylene Supply and Disposition
Refinery & Blender Net Production of Isobutane/Isobutylene
U.S. Refinery and Blender Net Production
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