View History:    Monthly     Annual   
Download Data (XLS File)
Rocky Mountain (PADD 4) Natural Gas Plant Stocks of Isobutane (Thousand Barrels)
Rocky Mountain (PADD 4) Natural Gas Plant Stocks of Isobutane (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1993 15 17 15 18 12 24 12 16 12 16 10 20
  1994 11 5 9 11 10 5 26 18 16 13 16 8
  1995 8 7 9 15 10 13 8 8 17 13 5 12
  1996 13 8 14 19 12 11 8 12 13 14 16 16
  1997 20 20 19 18 17 17 16 16 16 27 17 14
  1998 13 21 22 25 13 15 29 30 12 17 18 16
  1999 12 18 36 28 17 17 29 23 19 16 16 16
  2000 23 18 22 22 38 21 16 22 29 16 12 22
  2001 30 29 22 16 21 30 29 23 19 13 8 14
  2002 21 32 33 45 49 41 42 37 42 47 55 69
  2003 78 73 85 21 27 17 22 23 15 14 18 17
  2004 14 29 26 22 26 19 20 16 18 14 20 21
  2005 12 12 14 14 12 10 14 10 14 8 15 15
  2006 18 17 10 14 16 25 13 11 9 16 19 11
  2007 14 14 16 14 16 15 10 15 16 14 15 21
  2008 18 25 15 15 16 16 11 15 18 8 11 10
  2009 10 12 9 10 12 11 10 11 12 9 11 10
  2010 8 11 11 13 10 10 11 11 6 7 6 6
  2011 7 5 5 6 10 6 7 7 6 8 6 6
  2012 4 7 10 9 6 7 7 5 7 6 5 7
  2013 8 8 11 4 7 9 7 5 9 7 9 9
  2014 9 7 9 7 9 8 5 8 8 11 12 9
  2015 9 8 9 7 5 6 6 7 6 6 6 9
  2016 8 9 8 7 6 8 9 8 9 10 9 9
  2017 8 11 8 9 7 11 10 10 12 11 11 10
  2018 12 10 13 12 14 13 12 14 12 12 12 11
  2019 17 14 83 16 19 17 15 18 18 16 20 18
  2020 15 22 18 14 15 16 14 14 14 16 16 13
  2021 15 14 12 18 17 20 21 19 18 20 19 21
  2022 17 16 15


- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 5/31/2022
Next Release Date: 6/30/2022

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