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Rocky Mountain (PADD 4) Isobutane-Isobutylene Stocks at Refineries (Thousand Barrels)
Rocky Mountain (PADD 4) Isobutane-Isobutylene Stocks at Refineries (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1993 72 74 108 138 155 113 97 105 109 90 133 126
  1994 97 122 163 165 141 154 127 115 139 169 114 105
  1995 115 127 141 104 100 83 80 92 100 68 84 127
  1996 83 75 98 152 122 96 104 78 122 120 90 89
  1997 92 66 105 107 110 106 91 112 154 129 94 81
  1998 108 141 128 92 82 102 125 130 144 144 143 133
  1999 137 120 107 92 101 76 79 106 87 64 74 139
  2000 111 138 128 93 91 114 101 106 86 93 76 75
  2001 85 97 112 87 75 105 114 73 88 76 89 80
  2002 71 77 142 109 94 77 107 107 98 107 90 67
  2003 106 125 123 131 90 92 87 85 104 73 71 86
  2004 98 69 105 69 54 78 66 79 111 88 66 75
  2005 79 75 97 72 94 95 59 100 101 70 63 73
  2006 81 92 65 92 96 100 69 85 100 93 98 61
  2007 71 78 111 87 77 67 97 98 120 90 92 87
  2008 97 86 104 99 97 89 91 80 90 87 62 66
  2009 83 90 62 80 84 69 73 76 79 80 118 95
  2010 110 112 112 81 135 105 98 121 110 106 104 98
  2011 104 102 133 120 123 140 121 120 87 113 110 106
  2012 111 107 103 113 117 124 101 73 114 100 143 94
  2013 117 150 95 100 98 83 77 72 105 112 81 86
  2014 107 82 112 85 80 90 107


- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 9/29/2014
Next Release Date: Last Week of October 2014

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