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View History:
Monthly
Annual
Download Data (XLS File)
U.S. Isobutane-Isobutylene Stock Change(Thousand Barrels per Day)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
21
6
-8
15
-5
-4
3
-10
-8
-3
0
-12
1982
-21
7
-22
-18
13
-2
9
13
20
17
2
-31
1983
-35
2
11
33
16
57
9
-21
-7
29
-12
-26
1984
-33
8
-16
-9
2
26
-13
-8
0
8
-20
1
1985
-13
-34
8
-12
8
1
-9
-8
-14
15
-8
8
1986
-16
2
10
24
0
28
28
27
-4
-12
6
-53
1987
-23
-33
-5
7
41
-41
1
22
60
21
2
9
1988
-35
-24
-1
13
-8
15
15
14
16
-11
-21
-53
1989
-15
11
25
7
15
-19
5
0
9
-2
-9
-25
1990
-42
25
18
13
34
20
2
25
21
-4
-18
-36
1991
-23
0
-3
-15
7
22
-14
31
-4
-2
-26
-30
1992
75
-69
14
5
6
-35
-9
37
53
26
1
-19
1993
-6
-6
13
21
61
12
13
-23
8
-30
-57
-24
1994
-7
16
11
-19
-14
-20
31
35
-26
-35
-42
1995
-3
-21
6
19
21
8
20
7
-31
-11
-34
-12
1996
-21
-10
13
19
-4
30
30
16
-17
12
-47
-7
1997
-20
-33
-2
30
32
18
22
10
11
-21
-25
-8
1998
11
-7
19
-2
6
7
-11
14
-3
-30
-20
-15
1999
-7
7
-3
13
9
0
9
-16
-12
4
-16
-22
2000
-18
-1
-5
6
13
36
32
2
-18
-26
-23
-9
2001
-5
3
20
-1
41
-1
-12
21
1
-18
-21
-25
2002
-4
36
9
24
-1
-13
-5
8
2
-2
-13
-19
2003
-12
-4
-12
7
8
29
-5
3
23
35
-38
-45
2004
-12
-11
39
5
-9
-15
22
16
15
-61
7
1
2005
9
12
-7
24
8
-24
7
25
-22
19
-6
-29
2006
2
4
28
20
39
-23
-32
-2
-7
3
7
-45
2007
0
22
7
26
22
-1
2
-11
18
18
-44
-42
2008
2
3
23
14
12
-2
-5
20
6
-30
-34
-1
2009
8
22
-24
-6
1
-5
-1
3
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Release Date: 9/29/2009
Next Release Date: Last Week of October 2009
Referring Pages:
Isobutane/Isobutylene Supply and Disposition
U.S. Supply and Disposition