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Download Data (XLS File) |
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| Rocky Mountain (PADD 4) Isobutane-Isobutylene Stock Change (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 32 | 21 | 2 | 3 | -10 | -6 | 24 | -10 | -1 | -8 | -5 | 29 |
| 1982 | 13 | -20 | 9 | -9 | -10 | -4 | -5 | -8 | 3 | -1 | -6 | -7 |
| 1983 | -35 | 16 | 7 | -6 | 1 | -4 | -9 | 15 | 4 | 5 | -20 | 19 |
| 1984 | 4 | -16 | -4 | 9 | -3 | -9 | 24 | -13 | 9 | 6 | -18 | -5 |
| 1985 | -2 | 19 | -16 | -10 | 7 | 0 | 5 | 2 | -18 | 5 | -13 | 12 |
| 1986 | -1 | 25 | -4 | 20 | -29 | 1 | 63 | -18 | 20 | -5 | 8 | -36 |
| 1987 | 7 | 21 | -7 | -17 | -16 | 17 | -5 | -5 | 3 | -1 | 14 | 5 |
| 1988 | 19 | -13 | 6 | -24 | -12 | 0 | 12 | 3 | 67 | -7 | -25 | -39 |
| 1989 | 17 | 0 | -8 | -15 | -3 | -15 | 31 | -2 | -13 | 48 | -44 | 12 |
| 1990 | 1 | -5 | 43 | -20 | 3 | -14 | -10 | 13 | 4 | 5 | 7 | -18 |
| 1991 | -3 | 0 | 3 | 16 | -7 | -10 | 11 | -10 | 17 | -28 | -9 | 20 |
| 1992 | 46 | 3 | -1 | -9 | 26 | -81 | 16 | -36 | 50 | 38 | 1 | -21 |
| 1993 | -21 | 3 | 37 | 33 | 10 | -6 | -51 | 11 | -4 | -15 | 37 | 3 |
| 1994 | -62 | 19 | 49 | 5 | -25 | 6 | -7 | -21 | 22 | 27 | -53 | -17 |
| 1995 | 9 | 12 | 17 | -31 | -8 | -13 | -10 | 13 | 17 | -37 | 6 | 50 |
| 1996 | -43 | -13 | 30 | 60 | -36 | -27 | 5 | -22 | 44 | -2 | -29 | -1 |
| 1997 | 8 | -27 | 38 | 3 | 2 | -4 | -17 | 21 | 42 | -15 | -44 | -16 |
| 1998 | 26 | 41 | -11 | -33 | -21 | 22 | 38 | 6 | -4 | 4 | -1 | -13 |
| 1999 | -11 | 6 | -23 | -1 | -26 | 15 | 21 | -24 | -26 | 9 | 113 | |
| 2000 | -21 | 22 | -5 | -35 | 16 | 6 | -20 | 11 | -13 | -6 | -21 | 9 |
| 2001 | 19 | 11 | 7 | -30 | -7 | 39 | 7 | -47 | 8 | -18 | 11 | -3 |
| 2002 | -2 | 17 | 67 | -22 | -10 | -26 | 31 | -4 | -5 | 14 | -9 | -9 |
| 2003 | 48 | 14 | 11 | -56 | -33 | -9 | -1 | -1 | 12 | -33 | 1 | 14 |
| 2004 | 9 | -13 | 33 | -62 | -11 | 19 | -11 | 9 | 34 | -27 | -14 | 7 |
| 2005 | -5 | -4 | 26 | -26 | 19 | 0 | -32 | 37 | 5 | -37 | 0 | 11 |
| 2006 | 9 | 11 | -33 | 32 | 6 | 13 | -43 | 14 | 8 | -1 | 9 | -47 |
| 2007 | 12 | 9 | 36 | -27 | -7 | -12 | 25 | 6 | 23 | -32 | 2 | 1 |
| 2008 | 7 | -3 | 8 | -4 | -2 | -8 | -2 | -6 | 13 | -14 | -36 | 4 |
| 2009 | 15 | 10 | -31 | 18 | 6 | -17 | 4 | 5 | 4 | -2 | 40 | -25 |
| 2010 | 3 | 10 | -11 | -16 | 49 | -28 | -6 | 24 | -16 | -4 | -2 | -7 |
| 2011 | 6 | -4 | 31 | -13 | 8 | 13 | -19 | -2 | -33 | 28 | -6 | -5 |
| 2012 | 3 | 1 | 0 | 10 | 0 | 10 | -23 | -29 | 45 | -19 | 40 | -47 |
| 2013 | 23 | 36 | ||||||||||
| - = 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 |