View History:    Monthly     Annual   
Download Data (XLS File)
Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)
Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1981 0 0 0 0 0 0 0 0 0 0 0 0
  1982 0 0 0 0 0 0 0 0 0 0 0 0
  1983 0 0 0 0 0 0 0 0 0 0 0 0
  1984 4 4 4 4 4 4 5 4 4 5 5 5
  1985 5 5 5 5 5 4 5 5 6 5 5 5
  1986 5 5 5 5 5 5 5 5 5 5 5 5
  1987 5 6 6 6 6 6 5 6 6 6 6 7
  1988 7 8 8 8 8 8 8 7 7 8 8 8
  1989 7 8 8 8 8 6 7 7 8 8 8 8
  1990 8 8 8 8 8 8 7 7 7 7 8 7
  1991 8 9 8 9 10 10 11 10 11 10 9 9
  1992 10 10 10 11 11 11 11 10 11 11 13 10
  1993 9 10 11 11 10 10 10 10 10 11 10 10
  1994 8 9 9 10 10 10 10 10 11 10 10 11
  1995 10 10 10 10 11 11 11 11 10 10 10 11
  1996 10 10 10 10 10 10 10 10 9 9 9 9
  1997 9 9 10 10 10 10 10 9 11 10 9 10
  1998 9 10 10 10 10 11 11 10 10 10 10 9
  1999 10 10 10 10 10 12 11 11 11 11 12 12
  2000 12 11 12 12 12 11 11 12 12 12 12 11
  2001 11 11 11 12 12 12 11 11 11 10 11 10
  2002 10 12 11 11 11 11 10 11 11 12 11 11
  2003 10 11 11 10 10 11 10 11 10 11 10 10
  2004 10 11 11 11 11 11 11 11 11 11 10 10
  2005 9 10 10 10 10 10 10 10 10 10 10 9
  2006 9 9 9 9 9 9 9 9 9 8 9 8
  2007 9 9 9 8 8 9 8 9 10 9 10 10
  2008 10 11 12 11 12 12 12 12 12 11 11 10
  2009 11 11 11 12 12 12 12 12 12 13 13 12
  2010 13 13 13 14 14 13 13 13 13 13 13 13
  2011 14 14 14 15 14 13 14 14 14 15 14 14
  2012 14 14 14 14 14 13 13 13 16 16 16 16
  2013 16 16 17 17 16 16 15 17 17 16 17 16
  2014 17 17 18 18 18 18 18 19 18 19 20 20
  2015 19 20 21 20 20 21 22 23 23 24 24 24
  2016 24 24 25 25 24 24 24 24 24 24 25 24
  2017 24 24 25 25 25 24 24 25 26 25 26 26
  2018 26 25 25 26 27 26 26 28 28 28 26 28
  2019 28 28 31 31 31 32 31 31 33 33 35 36
  2020 36 36 37 34 31 32 33 33 33 32 32 31
  2021 30 30 30 28 32 33 33 33 33 34 34 34
  2022 31 31 31 32 31 33 33 34 34 33 33 28
  2023 29 31 32 32 34 34 34 35 34 35 36 36
  2024 36

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 3/29/2024
Next Release Date: 4/30/2024

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