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
Rocky Mountain (PADD 4) Normal Butane-Butylene Field Production (Thousand Barrels per Day)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
9
9
9
8
7
7
7
8
8
9
9
9
1982
9
9
9
9
9
8
8
7
8
10
11
10
1983
10
10
9
8
8
9
8
8
8
8
9
9
1984
15
15
15
15
14
15
14
13
15
17
17
17
1985
17
17
17
16
15
15
15
14
15
16
17
17
1986
17
17
17
16
16
15
14
13
14
16
17
17
1987
17
17
16
15
15
14
15
13
14
16
16
18
1988
18
18
18
18
18
17
17
17
17
17
18
18
1989
18
17
19
18
18
16
16
18
16
18
18
18
1990
18
18
18
18
17
16
16
17
17
18
18
17
1991
19
20
20
20
20
21
21
21
21
21
21
20
1992
16
16
15
15
15
15
14
14
15
15
17
18
1993
17
17
16
15
14
15
15
15
15
16
16
16
1994
17
15
16
16
17
17
16
17
16
16
16
17
1995
18
16
17
18
16
16
17
17
17
21
20
20
1996
19
21
19
19
18
18
17
16
17
18
20
19
1997
18
18
17
16
17
16
17
17
17
19
19
19
1998
18
19
19
19
19
18
18
19
19
20
20
19
1999
20
19
19
19
18
20
21
20
20
20
19
20
2000
20
20
21
23
22
23
23
23
24
25
24
24
2001
25
25
25
24
23
23
23
23
24
24
25
25
2002
25
25
25
25
24
24
23
25
25
26
25
26
2003
26
26
25
23
22
22
23
23
24
25
24
24
2004
24
23
24
24
24
25
24
25
25
25
26
25
2005
25
25
25
23
24
22
23
24
23
24
23
23
2006
23
24
24
23
24
24
24
23
24
24
24
24
2007
23
24
26
26
26
25
25
27
30
29
31
27
2008
28
29
30
32
Updated on 6/26/2008
Source: U.S. Energy Information Administration
Contact Us
·
Feedback
·
Privacy/Security
·
Jobs
·
About Us