| Year | Data | Change | Unit |
|---|---|---|---|
| 1949 | 5.8 | 0 | Million Btu per Barrel |
| 1950 | 5.8 | 0 | Million Btu per Barrel |
| 1951 | 5.8 | 0 | Million Btu per Barrel |
| 1952 | 5.8 | 0 | Million Btu per Barrel |
| 1953 | 5.8 | 0 | Million Btu per Barrel |
| 1954 | 5.8 | 0 | Million Btu per Barrel |
| 1955 | 5.8 | 0 | Million Btu per Barrel |
| 1956 | 5.8 | 0 | Million Btu per Barrel |
| 1957 | 5.8 | 0 | Million Btu per Barrel |
| 1958 | 5.8 | 0 | Million Btu per Barrel |
| 1959 | 5.8 | 0 | Million Btu per Barrel |
| 1960 | 5.8 | 0 | Million Btu per Barrel |
| 1961 | 5.8 | 0 | Million Btu per Barrel |
| 1962 | 5.8 | 0 | Million Btu per Barrel |
| 1963 | 5.8 | 0 | Million Btu per Barrel |
| 1964 | 5.8 | 0 | Million Btu per Barrel |
| 1965 | 5.8 | 0 | Million Btu per Barrel |
| 1966 | 5.8 | 0 | Million Btu per Barrel |
| 1967 | 5.8 | 0 | Million Btu per Barrel |
| 1968 | 5.8 | 0 | Million Btu per Barrel |
| 1969 | 5.8 | 0 | Million Btu per Barrel |
| 1970 | 5.8 | 0 | Million Btu per Barrel |
| 1971 | 5.8 | 0 | Million Btu per Barrel |
| 1972 | 5.8 | 0 | Million Btu per Barrel |
| 1973 | 5.8 | 0 | Million Btu per Barrel |
| 1974 | 5.8 | 0 | Million Btu per Barrel |
| 1975 | 5.8 | 0 | Million Btu per Barrel |
| 1976 | 5.8 | 0 | Million Btu per Barrel |
| 1977 | 5.8 | 0 | Million Btu per Barrel |
| 1978 | 5.8 | 0 | Million Btu per Barrel |
| 1979 | 5.8 | 0 | Million Btu per Barrel |
| 1980 | 5.8 | 0 | Million Btu per Barrel |
| 1981 | 5.8 | 0 | Million Btu per Barrel |
| 1982 | 5.8 | 0 | Million Btu per Barrel |
| 1983 | 5.8 | 0 | Million Btu per Barrel |
| 1984 | 5.8 | 0 | Million Btu per Barrel |
| 1985 | 5.8 | 0 | Million Btu per Barrel |
| 1986 | 5.8 | 0 | Million Btu per Barrel |
| 1987 | 5.8 | 0 | Million Btu per Barrel |
| 1988 | 5.8 | 0 | Million Btu per Barrel |
| 1989 | 5.8 | 0 | Million Btu per Barrel |
| 1990 | 5.8 | 0 | Million Btu per Barrel |
| 1991 | 5.8 | 0 | Million Btu per Barrel |
| 1992 | 5.8 | 0 | Million Btu per Barrel |
| 1993 | 5.8 | 0 | Million Btu per Barrel |
| 1994 | 5.8 | 0 | Million Btu per Barrel |
| 1995 | 5.8 | 0 | Million Btu per Barrel |
| 1996 | 5.8 | 0 | Million Btu per Barrel |
| 1997 | 5.8 | 0 | Million Btu per Barrel |
| 1998 | 5.8 | 0 | Million Btu per Barrel |
| 1999 | 5.8 | 0 | Million Btu per Barrel |
| 2000 | 5.8 | 0 | Million Btu per Barrel |
| 2001 | 5.8 | 0 | Million Btu per Barrel |
| 2002 | 5.8 | 0 | Million Btu per Barrel |
| 2003 | 5.8 | 0 | Million Btu per Barrel |
| 2004 | 5.8 | 0 | Million Btu per Barrel |
| 2005 | 5.8 | 0 | Million Btu per Barrel |
| 2006 | 5.8 | 0 | Million Btu per Barrel |
| 2007 | 5.8 | 0 | Million Btu per Barrel |
| 2008 | 5.8 | 0 | Million Btu per Barrel |
| 2009 | 5.8 | 0 | Million Btu per Barrel |
| 2010 | 5.8 | 0 | Million Btu per Barrel |
| 2011 | 5.8 | 0 | Million Btu per Barrel |
| 2012 | 5.8 | 0 | Million Btu per Barrel |
| 2013 | 5.8 | 0 | Million Btu per Barrel |
| 2014 | 5.8 | 0 | Million Btu per Barrel |
| 2015 | 5.717 | -0.083 | Million Btu per Barrel |
| 2016 | 5.722 | + 0.0050000000000008 | Million Btu per Barrel |
| 2017 | 5.723 | + 0.00099999999999945 | Million Btu per Barrel |
| 2018 | 5.706 | -0.016999999999999 | Million Btu per Barrel |
| 2019 | 5.698 | -0.008 | Million Btu per Barrel |
| 2020 | 5.691 | -0.0070000000000006 | Million Btu per Barrel |
| 2021 | 5.691 | 0 | Million Btu per Barrel |