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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)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
-23
14
-19
10
-17
37
-39
-6
4
3
7
-8
1982
0
5
-11
1
0
3
-1
-2
8
9
-3
5
1983
-22
1
-4
20
-18
-2
3
1
4
103
7
-23
1984
-16
-14
-28
16
-34
1
38
5
-42
-2
3
-1
1985
-1
-1
18
19
9
-28
11
-14
7
13
-22
-16
1986
48
-18
11
24
33
-36
-22
-9
-15
69
-67
33
1987
19
-32
53
-15
-49
1
33
-18
-24
31
-4
21
1988
-25
15
-14
-13
19
3
-7
-6
2
22
4
-10
1989
1
-22
-9
31
12
-12
3
-20
-10
37
1
-23
1990
87
2
60
-9
3
-51
45
70
17
-11
-5
-45
1991
-36
-11
-11
40
-1
-13
13
24
12
-92
10
-1
1992
-21
-20
196
-5
11
-111
-40
-19
44
-32
-15
-18
1993
18
-6
-2
146
43
-68
11
-82
14
18
-73
-39
1994
3
25
59
-46
104
-34
143
-18
-22
-86
30
-41
1995
-34
-38
45
-3
-30
22
14
-28
-33
91
-1
-12
1996
-9
-36
-35
91
1
46
1
-29
9
-18
-65
7
1997
-1
74
-173
76
276
101
-65
-128
25
1
-1
38
1998
-66
-193
226
48
-92
29
-8
51
-112
-47
-89
42
1999
-68
110
-44
17
-20
-103
368
-63
-59
-88
-100
49
2000
-46
98
-120
-17
66
125
8
-56
-13
-38
-79
35
2001
15
52
-53
-29
70
91
-56
46
-52
-10
-15
10
2002
81
-7
138
87
-28
-33
-166
-25
30
-35
36
2003
27
-31
-115
182
7
136
-239
-91
7
-11
20
-34
2004
82
47
14
58
101
-88
-54
40
-73
-53
-53
2005
74
-20
-45
267
-47
-137
-14
-20
-85
263
-87
-117
2006
73
-16
-59
-16
218
-94
8
-28
-52
-45
11
67
2007
38
-112
136
36
-2
-87
110
-43
50
-109
-38
28
2008
-21
-52
109
119
Updated on 6/26/2008
Source: U.S. Energy Information Administration
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