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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
Rocky Mountain (PADD 4) Normal Butane-Butylene Stock Change (Thousand Barrels)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
19
67
-35
-119
-70
-9
14
38
25
62
27
-82
1982
-17
24
-66
5
24
60
-19
-16
19
-6
46
4
1983
-151
27
-25
24
-6
-39
-27
1
29
-27
-2
-3
1984
25
35
45
-12
-48
-37
49
-18
-10
63
-87
33
1985
41
-14
45
33
20
-18
1
-26
57
-46
-20
-61
1986
17
5
-29
91
-12
-11
-16
-34
10
-3
-40
-5
1987
37
-13
-4
45
87
-27
-66
25
-2
3
-28
-6
1988
-22
24
-6
13
-13
-20
37
-1
37
-46
-40
8
1989
18
-37
-11
94
-28
8
-11
41
29
-50
-2
12
1990
5
-30
2
-31
-22
14
39
46
89
-39
-87
23
1991
0
39
-10
-30
-3
11
19
14
19
-10
4
-37
1992
11
-70
34
-4
48
22
13
20
-16
-75
-4
-38
1993
-40
24
51
-8
31
30
-31
82
-34
-61
-44
26
1994
58
-3
-26
-13
5
21
16
36
-9
1
-23
-25
1995
5
-104
84
10
-9
5
13
32
54
-21
-108
-13
1996
7
31
30
-29
15
-17
18
-7
48
-23
-76
-17
1997
-13
41
35
-36
16
-4
5
66
-39
9
-47
-4
1998
17
15
-13
15
-45
-13
45
65
-52
-31
67
-61
1999
-2
30
12
-3
-2
-6
34
-5
-32
16
-60
35
2000
51
-10
-28
136
-2
-23
-27
86
-61
32
-105
-26
2001
43
31
5
38
25
-15
-20
61
-53
-55
-8
14
2002
-4
-1
-36
67
-31
20
-26
29
-7
-30
4
-33
2003
-5
42
22
-3
32
-112
56
-2
-50
-2
19
28
2004
-34
15
31
-56
-2
-25
26
2
-28
7
-60
2005
76
-42
60
11
6
-12
7
-14
-52
41
-46
61
2006
-40
-17
84
-9
20
35
-15
23
-55
-15
-50
-5
2007
-20
40
44
60
45
-29
12
6
-19
-75
-4
-39
2008
-38
-12
-6
31
Updated on 6/26/2008
Source: U.S. Energy Information Administration
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