| Year | Data | Change | Unit |
|---|---|---|---|
| 1949 | 5.485 | 0 | Million Btu per Barrel |
| 1950 | 5.473 | -0.012 | Million Btu per Barrel |
| 1951 | 5.483 | + 0.0099999999999998 | Million Btu per Barrel |
| 1952 | 5.479 | -0.0039999999999996 | Million Btu per Barrel |
| 1953 | 5.455 | -0.024 | Million Btu per Barrel |
| 1954 | 5.465 | + 0.0099999999999998 | Million Btu per Barrel |
| 1955 | 5.47 | + 0.0049999999999999 | Million Btu per Barrel |
| 1956 | 5.464 | -0.0059999999999993 | Million Btu per Barrel |
| 1957 | 5.451 | -0.013000000000001 | Million Btu per Barrel |
| 1958 | 5.455 | + 0.0040000000000004 | Million Btu per Barrel |
| 1959 | 5.395 | -0.06 | Million Btu per Barrel |
| 1960 | 5.418 | + 0.023000000000001 | Million Btu per Barrel |
| 1961 | 5.42 | + 0.0019999999999998 | Million Btu per Barrel |
| 1962 | 5.406 | -0.014 | Million Btu per Barrel |
| 1963 | 5.382 | -0.024 | Million Btu per Barrel |
| 1964 | 5.362 | -0.02 | Million Btu per Barrel |
| 1965 | 5.365 | + 0.0030000000000001 | Million Btu per Barrel |
| 1966 | 5.336 | -0.029 | Million Btu per Barrel |
| 1967 | 5.315 | -0.021 | Million Btu per Barrel |
| 1968 | 5.303 | -0.012 | Million Btu per Barrel |
| 1969 | 5.251 | -0.052 | Million Btu per Barrel |
| 1970 | 5.262 | + 0.010999999999999 | Million Btu per Barrel |
| 1971 | 5.259 | -0.0029999999999992 | Million Btu per Barrel |
| 1972 | 5.244 | -0.015000000000001 | Million Btu per Barrel |
| 1973 | 5.26 | + 0.016 | Million Btu per Barrel |
| 1974 | 5.255 | -0.0049999999999999 | Million Btu per Barrel |
| 1975 | 5.255 | 0 | Million Btu per Barrel |
| 1976 | 5.278 | + 0.023 | Million Btu per Barrel |
| 1977 | 5.286 | + 0.008 | Million Btu per Barrel |
| 1978 | 5.288 | + 0.0020000000000007 | Million Btu per Barrel |
| 1979 | 5.366 | + 0.077999999999999 | Million Btu per Barrel |
| 1980 | 5.322 | -0.044 | Million Btu per Barrel |
| 1981 | 5.284 | -0.038 | Million Btu per Barrel |
| 1982 | 5.267 | -0.016999999999999 | Million Btu per Barrel |
| 1983 | 5.141 | -0.126 | Million Btu per Barrel |
| 1984 | 5.308 | + 0.167 | Million Btu per Barrel |
| 1985 | 5.264 | -0.044 | Million Btu per Barrel |
| 1986 | 5.269 | + 0.0049999999999999 | Million Btu per Barrel |
| 1987 | 5.241 | -0.028 | Million Btu per Barrel |
| 1988 | 5.259 | + 0.018000000000001 | Million Btu per Barrel |
| 1989 | 5.195 | -0.064 | Million Btu per Barrel |
| 1990 | 5.146 | -0.049 | Million Btu per Barrel |
| 1991 | 5.096 | -0.05 | Million Btu per Barrel |
| 1992 | 5.126 | + 0.03 | Million Btu per Barrel |
| 1993 | 5.103 | -0.023000000000001 | Million Btu per Barrel |
| 1994 | 5.097 | -0.0059999999999993 | Million Btu per Barrel |
| 1995 | 5.062 | -0.035 | Million Btu per Barrel |
| 1996 | 4.997 | -0.065 | Million Btu per Barrel |
| 1997 | 4.988 | -0.0089999999999995 | Million Btu per Barrel |
| 1998 | 4.974 | -0.014 | Million Btu per Barrel |
| 1999 | 4.902 | -0.072 | Million Btu per Barrel |
| 2000 | 4.908 | + 0.0060000000000002 | Million Btu per Barrel |
| 2001 | 4.936 | + 0.028 | Million Btu per Barrel |
| 2002 | 4.885 | -0.051 | Million Btu per Barrel |
| 2003 | 4.92 | + 0.035 | Million Btu per Barrel |
| 2004 | 4.952 | + 0.032 | Million Btu per Barrel |
| 2005 | 4.915 | -0.037 | Million Btu per Barrel |
| 2006 | 4.886 | -0.029 | Million Btu per Barrel |
| 2007 | 4.833 | -0.053 | Million Btu per Barrel |
| 2008 | 4.772 | -0.061 | Million Btu per Barrel |
| 2009 | 4.664 | -0.108 | Million Btu per Barrel |
| 2010 | 4.664 | 0 | Million Btu per Barrel |
| 2011 | 4.657 | -0.0069999999999997 | Million Btu per Barrel |
| 2012 | 4.714 | + 0.057 | Million Btu per Barrel |
| 2013 | 4.648 | -0.066000000000001 | Million Btu per Barrel |
| 2014 | 4.664 | + 0.016 | Million Btu per Barrel |
| 2015 | 4.721 | + 0.057 | Million Btu per Barrel |
| 2016 | 4.631 | -0.09 | Million Btu per Barrel |
| 2017 | 4.623 | -0.008 | Million Btu per Barrel |
| 2018 | 4.62 | -0.0030000000000001 | Million Btu per Barrel |
| 2019 | 4.54 | -0.08 | Million Btu per Barrel |
| 2020 | 4.514 | -0.026 | Million Btu per Barrel |
| 2021 | 4.514 | 0 | Million Btu per Barrel |