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| Rocky Mountain (PADD 4) Imports of Normal Butane-Butylene (Thousand Barrels per Day) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 8 | 11 | 7 | 3 | 4 | 6 | 5 | 8 | 7 | 9 | 12 | 13 |
| 1982 | 7 | 10 | 3 | 3 | 5 | 6 | 4 | 4 | 12 | 8 | 8 | 7 |
| 1983 | 9 | 8 | 5 | 3 | 4 | 5 | 4 | 7 | 6 | 7 | 5 | 5 |
| 1984 | 5 | 5 | 4 | 4 | 3 | 2 | 3 | 3 | 4 | 8 | 7 | 8 |
| 1985 | 5 | 5 | 4 | 2 | 2 | 3 | 4 | 5 | 5 | 4 | 4 | 5 |
| 1986 | 6 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 4 | 2 | 5 | 4 |
| 1987 | 5 | 5 | 5 | 4 | 3 | 3 | 3 | 2 | 3 | 5 | 4 | 5 |
| 1988 | 6 | 5 | 4 | 3 | 5 | 2 | 3 | 3 | 3 | 2 | 4 | 5 |
| 1989 | 5 | 3 | 4 | 2 | 2 | 1 | 2 | 2 | 1 | 3 | 4 | 4 |
| 1990 | 1 | 3 | 1 | 1 | 2 | 1 | 0 | 4 | 5 | 4 | 6 | 6 |
| 1991 | 4 | 3 | 1 | 1 | 1 | 3 | 2 | 2 | 4 | 5 | 6 | 4 |
| 1992 | 2 | 1 | 2 | 0 | 1 | 1 | 1 | 0 | 1 | 2 | 4 | 4 |
| 1993 | 3 | 3 | 2 | 0 | 1 | 0 | 1 | 2 | 3 | 5 | 6 | |
| 1994 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 6 | 6 | 5 |
| 1995 | 4 | 2 | 2 | 1 | 0 | 1 | 2 | 1 | 2 | 3 | 4 | 9 |
| 1996 | 7 | 5 | 3 | 3 | 1 | 0 | 2 | 0 | 4 | 4 | 7 | 6 |
| 1997 | 5 | 5 | 1 | 1 | 1 | 0 | 1 | 2 | 2 | 4 | 5 | 7 |
| 1998 | 6 | 5 | 2 | 1 | 1 | 2 | 1 | 0 | 1 | 2 | 2 | 2 |
| 1999 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 6 | 7 | 5 |
| 2000 | 14 | 4 | 3 | 1 | 3 | 1 | 3 | 3 | 3 | 3 | 5 | 5 |
| 2001 | 4 | 2 | 3 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 3 | 4 |
| 2002 | 4 | 2 | 2 | 1 | 3 | 2 | 3 | 3 | 3 | 4 | 3 | |
| 2003 | 4 | 2 | 1 | 1 | 3 | 2 | 4 | 4 | 3 | 4 | ||
| 2004 | 4 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 3 | 1 | 3 | 3 |
| 2005 | 3 | 1 | 1 | 1 | 0 | 2 | 1 | 2 | 1 | 3 | 2 | 3 |
| 2006 | 4 | 3 | 3 | 0 | 0 | 2 | 0 | 0 | 1 | 2 | 2 | 3 |
| 2007 | 2 | 1 | 1 | 0 | 1 | 1 | 1 | 2 | 3 | 2 | ||
| 2008 | 2 | 1 | 1 | 1 | 0 | 1 | 2 | 1 | ||||
| 2009 | 2 | 1 | 0 | 0 | 0 | 0 | 1 | |||||
| 2010 | 0 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 0 | 0 | 0 |
| 2011 | 0 | 0 | 0 | 0 | 0 | |||||||
| 2012 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| 2013 | 1 | 1 | 1 | |||||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 5/30/2013 |
| Next Release Date: Last Week of June 2013 |