1949 | 24.612 | 0 | Million Btu per Short Ton |
1950 | 24.82 | + 0.208 | Million Btu per Short Ton |
1951 | 24.521 | -0.299 | Million Btu per Short Ton |
1952 | 24.724 | + 0.203 | Million Btu per Short Ton |
1953 | 24.785 | + 0.061 | Million Btu per Short Ton |
1954 | 24.788 | + 0.0030000000000001 | Million Btu per Short Ton |
1955 | 24.821 | + 0.033000000000001 | Million Btu per Short Ton |
1956 | 24.664 | -0.157 | Million Btu per Short Ton |
1957 | 24.707 | + 0.042999999999999 | Million Btu per Short Ton |
1958 | 24.606 | -0.101 | Million Btu per Short Ton |
1959 | 24.609 | + 0.0030000000000001 | Million Btu per Short Ton |
1960 | 24.609 | 0 | Million Btu per Short Ton |
1961 | 24.58 | -0.029000000000003 | Million Btu per Short Ton |
1962 | 24.562 | -0.017999999999997 | Million Btu per Short Ton |
1963 | 24.509 | -0.053000000000001 | Million Btu per Short Ton |
1964 | 24.477 | -0.032 | Million Btu per Short Ton |
1965 | 24.385 | -0.091999999999999 | Million Btu per Short Ton |
1966 | 24.226 | -0.159 | Million Btu per Short Ton |
1967 | 24.04 | -0.186 | Million Btu per Short Ton |
1968 | 24.014 | -0.026 | Million Btu per Short Ton |
1969 | 23.724 | -0.29 | Million Btu per Short Ton |
1970 | 22.983 | -0.741 | Million Btu per Short Ton |
1971 | 22.67 | -0.313 | Million Btu per Short Ton |
1972 | 22.55 | -0.12 | Million Btu per Short Ton |
1973 | 22.586 | + 0.035999999999998 | Million Btu per Short Ton |
1974 | 22.419 | -0.167 | Million Btu per Short Ton |
1975 | 22.436 | + 0.016999999999999 | Million Btu per Short Ton |
1976 | 22.53 | + 0.094000000000001 | Million Btu per Short Ton |
1977 | 22.322 | -0.208 | Million Btu per Short Ton |
1978 | 22.207 | -0.115 | Million Btu per Short Ton |
1979 | 22.452 | + 0.245 | Million Btu per Short Ton |
1980 | 22.69 | + 0.238 | Million Btu per Short Ton |
1981 | 22.585 | -0.105 | Million Btu per Short Ton |
1982 | 22.712 | + 0.127 | Million Btu per Short Ton |
1983 | 22.691 | -0.021000000000001 | Million Btu per Short Ton |
1984 | 22.543 | -0.148 | Million Btu per Short Ton |
1985 | 22.02 | -0.523 | Million Btu per Short Ton |
1986 | 22.198 | + 0.178 | Million Btu per Short Ton |
1987 | 22.381 | + 0.183 | Million Btu per Short Ton |
1988 | 22.36 | -0.021000000000001 | Million Btu per Short Ton |
1989 | 22.347 | -0.012999999999998 | Million Btu per Short Ton |
1990 | 22.457 | + 0.11 | Million Btu per Short Ton |
1991 | 22.46 | + 0.0030000000000001 | Million Btu per Short Ton |
1992 | 22.25 | -0.21 | Million Btu per Short Ton |
1993 | 22.123 | -0.127 | Million Btu per Short Ton |
1994 | 22.068 | -0.055 | Million Btu per Short Ton |
1995 | 21.95 | -0.118 | Million Btu per Short Ton |
1996 | 22.105 | + 0.155 | Million Btu per Short Ton |
1997 | 22.172 | + 0.067 | Million Btu per Short Ton |
1998 | 23.164 | + 0.992 | Million Btu per Short Ton |
1999 | 22.489 | -0.675 | Million Btu per Short Ton |
2000 | 22.433 | -0.056000000000001 | Million Btu per Short Ton |
2001 | 22.622 | + 0.189 | Million Btu per Short Ton |
2002 | 22.562 | -0.059999999999999 | Million Btu per Short Ton |
2003 | 22.468 | -0.094000000000001 | Million Btu per Short Ton |
2004 | 22.473 | + 0.004999999999999 | Million Btu per Short Ton |
2005 | 22.178 | -0.295 | Million Btu per Short Ton |
2006 | 22.05 | -0.128 | Million Btu per Short Ton |
2007 | 22.371 | + 0.321 | Million Btu per Short Ton |
2008 | 22.304 | -0.067 | Million Btu per Short Ton |
2009 | 21.823 | -0.481 | Million Btu per Short Ton |
2010 | 21.846 | + 0.023 | Million Btu per Short Ton |
2011 | 21.568 | -0.278 | Million Btu per Short Ton |
2012 | 21.449 | -0.119 | Million Btu per Short Ton |
2013 | 21.6 | + 0.151 | Million Btu per Short Ton |
2014 | 21.525 | -0.075000000000003 | Million Btu per Short Ton |
2015 | 21.258 | -0.267 | Million Btu per Short Ton |
2016 | 21.055 | -0.203 | Million Btu per Short Ton |
2017 | 20.802 | -0.253 | Million Btu per Short Ton |
2018 | 20.739 | -0.062999999999999 | Million Btu per Short Ton |
2019 | 20.721 | -0.018000000000001 | Million Btu per Short Ton |
2020 | 20.414 | -0.307 | Million Btu per Short Ton |
2021 | 20.414 | 0 | Million Btu per Short Ton |