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| Rocky Mountain (PADD 4) Refinery and Blender Net Production of Normal Butane-Butylene (Thousand Barrels per Day) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 2 | 0 | 0 | 0 | -3 | 1 | 0 | -1 | 0 | -1 | -2 | 2 |
| 1982 | -4 | -3 | -3 | -1 | -1 | 0 | -2 | -2 | -2 | -3 | -2 | -1 |
| 1983 | -2 | -1 | -1 | 0 | 0 | 0 | 0 | 0 | 0 | -3 | -2 | -2 |
| 1984 | -3 | -2 | -1 | -1 | 1 | -2 | -1 | -1 | 0 | -3 | -4 | -3 |
| 1985 | 0 | 0 | 0 | 2 | 2 | 3 | 0 | 4 | 4 | 2 | 1 | 1 |
| 1986 | 1 | 1 | 2 | 2 | 3 | 4 | 4 | 4 | 4 | 3 | 0 | 0 |
| 1987 | 0 | 0 | 2 | 3 | 4 | 5 | 4 | 4 | 5 | 4 | 1 | 0 |
| 1988 | 0 | 1 | 2 | 4 | 5 | 6 | 5 | 5 | 5 | 2 | -1 | -1 |
| 1989 | -1 | -1 | -1 | 1 | 3 | 5 | 4 | 3 | 4 | -1 | -1 | -1 |
| 1990 | 1 | 1 | 0 | 1 | 4 | 3 | 2 | 2 | 2 | 0 | -3 | -4 |
| 1991 | -4 | -1 | 0 | 0 | 1 | 2 | 1 | 2 | 2 | -1 | -2 | -5 |
| 1992 | -3 | -3 | 2 | 3 | 4 | 3 | 3 | 3 | 1 | -2 | -3 | -6 |
| 1993 | -5 | -3 | 0 | 2 | 2 | 4 | 4 | 3 | 0 | -3 | -4 | -7 |
| 1994 | -4 | -4 | -3 | 1 | 2 | 3 | 4 | 3 | -2 | -3 | -5 | |
| 1995 | -4 | -5 | 1 | 2 | 4 | 3 | 3 | 3 | 2 | -3 | -7 | -6 |
| 1996 | -6 | -7 | 0 | 1 | 2 | 2 | 0 | 1 | 0 | -3 | -4 | -6 |
| 1997 | -5 | -6 | -2 | 2 | 2 | 2 | 1 | 2 | -1 | -4 | -4 | -5 |
| 1998 | -7 | -6 | -2 | 1 | 3 | 2 | 2 | 3 | -4 | -6 | -8 | |
| 1999 | -6 | -4 | 0 | 2 | 4 | 2 | 2 | 3 | -1 | -2 | -6 | -6 |
| 2000 | -4 | -3 | -1 | 7 | 4 | 3 | 2 | 3 | 0 | -4 | -7 | -6 |
| 2001 | -5 | -3 | -2 | 4 | 2 | 3 | 2 | 4 | 0 | -4 | -6 | -4 |
| 2002 | -5 | -3 | -1 | 3 | 1 | 3 | 2 | 3 | 0 | -3 | -3 | -6 |
| 2003 | -7 | -5 | -1 | 2 | 5 | 1 | 2 | 0 | -1 | -4 | -5 | -6 |
| 2004 | -7 | -3 | 0 | 1 | 3 | 2 | 2 | 2 | -1 | -5 | -6 | -11 |
| 2005 | -8 | -6 | 1 | 3 | 3 | 3 | 2 | 2 | -2 | -5 | -9 | -10 |
| 2006 | -5 | -4 | 0 | 4 | 5 | 4 | 4 | 4 | 2 | -1 | -3 | -10 |
| 2007 | -7 | -2 | 2 | 6 | 6 | 5 | 5 | 4 | 0 | -2 | -5 | -8 |
| 2008 | -9 | -4 | 1 | 6 | 5 | 7 | 4 | 5 | 2 | -2 | -6 | -6 |
| 2009 | -6 | -3 | 5 | 9 | 8 | 7 | 7 | 7 | 3 | -1 | -7 | -6 |
| 2010 | -7 | -1 | 6 | 8 | 7 | 6 | 5 | 5 | 2 | -3 | -5 | -4 |
| 2011 | -7 | -4 | 1 | 4 | 7 | 5 | 4 | 5 | 1 | -4 | -8 | -7 |
| 2012 | -5 | -1 | 3 | 4 | 7 | 6 | 5 | 5 | 0 | -3 | -5 | -7 |
| 2013 | -5 | -2 | ||||||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 4/29/2013 |
| Next Release Date: Last Week of May 2013 |