1949 | 23.761 | 0 | Million Btu per Short Ton |
1950 | 23.937 | + 0.176 | Million Btu per Short Ton |
1951 | 23.701 | -0.236 | Million Btu per Short Ton |
1952 | 23.885 | + 0.184 | Million Btu per Short Ton |
1953 | 23.964 | + 0.078999999999997 | Million Btu per Short Ton |
1954 | 23.996 | + 0.032 | Million Btu per Short Ton |
1955 | 24.056 | + 0.060000000000002 | Million Btu per Short Ton |
1956 | 23.943 | -0.113 | Million Btu per Short Ton |
1957 | 23.98 | + 0.036999999999999 | Million Btu per Short Ton |
1958 | 23.897 | -0.083000000000002 | Million Btu per Short Ton |
1959 | 23.924 | + 0.027000000000001 | Million Btu per Short Ton |
1960 | 23.927 | + 0.0030000000000001 | Million Btu per Short Ton |
1961 | 23.904 | -0.023 | Million Btu per Short Ton |
1962 | 23.911 | + 0.0070000000000014 | Million Btu per Short Ton |
1963 | 23.897 | -0.014000000000003 | Million Btu per Short Ton |
1964 | 23.864 | -0.032999999999998 | Million Btu per Short Ton |
1965 | 23.78 | -0.084 | Million Btu per Short Ton |
1966 | 23.648 | -0.132 | Million Btu per Short Ton |
1967 | 23.506 | -0.142 | Million Btu per Short Ton |
1968 | 23.486 | -0.02 | Million Btu per Short Ton |
1969 | 23.24 | -0.246 | Million Btu per Short Ton |
1970 | 22.573 | -0.667 | Million Btu per Short Ton |
1971 | 22.301 | -0.272 | Million Btu per Short Ton |
1972 | 22.204 | -0.096999999999998 | Million Btu per Short Ton |
1973 | 22.246 | + 0.041999999999998 | Million Btu per Short Ton |
1974 | 21.781 | -0.465 | Million Btu per Short Ton |
1975 | 21.642 | -0.139 | Million Btu per Short Ton |
1976 | 21.679 | + 0.036999999999999 | Million Btu per Short Ton |
1977 | 21.508 | -0.171 | Million Btu per Short Ton |
1978 | 21.275 | -0.233 | Million Btu per Short Ton |
1979 | 21.364 | + 0.089000000000002 | Million Btu per Short Ton |
1980 | 21.295 | -0.068999999999999 | Million Btu per Short Ton |
1981 | 21.085 | -0.21 | Million Btu per Short Ton |
1982 | 21.194 | + 0.109 | Million Btu per Short Ton |
1983 | 21.133 | -0.061 | Million Btu per Short Ton |
1984 | 21.101 | -0.032 | Million Btu per Short Ton |
1985 | 20.959 | -0.142 | Million Btu per Short Ton |
1986 | 21.084 | + 0.125 | Million Btu per Short Ton |
1987 | 21.136 | + 0.052 | Million Btu per Short Ton |
1988 | 20.9 | -0.236 | Million Btu per Short Ton |
1989 | 20.898 | -0.0019999999999989 | Million Btu per Short Ton |
1990 | 20.779 | -0.119 | Million Btu per Short Ton |
1991 | 20.73 | -0.048999999999999 | Million Btu per Short Ton |
1992 | 20.709 | -0.021000000000001 | Million Btu per Short Ton |
1993 | 20.677 | -0.032 | Million Btu per Short Ton |
1994 | 20.589 | -0.088000000000001 | Million Btu per Short Ton |
1995 | 20.543 | -0.045999999999999 | Million Btu per Short Ton |
1996 | 20.547 | + 0.0040000000000013 | Million Btu per Short Ton |
1997 | 20.518 | -0.029 | Million Btu per Short Ton |
1998 | 20.516 | -0.0020000000000024 | Million Btu per Short Ton |
1999 | 20.49 | -0.026 | Million Btu per Short Ton |
2000 | 20.511 | + 0.021000000000001 | Million Btu per Short Ton |
2001 | 20.337 | -0.174 | Million Btu per Short Ton |
2002 | 20.238 | -0.099 | Million Btu per Short Ton |
2003 | 20.082 | -0.156 | Million Btu per Short Ton |
2004 | 19.98 | -0.102 | Million Btu per Short Ton |
2005 | 19.988 | + 0.0079999999999991 | Million Btu per Short Ton |
2006 | 19.931 | -0.056999999999999 | Million Btu per Short Ton |
2007 | 19.909 | -0.022000000000002 | Million Btu per Short Ton |
2008 | 19.713 | -0.196 | Million Btu per Short Ton |
2009 | 19.521 | -0.192 | Million Btu per Short Ton |
2010 | 19.623 | + 0.102 | Million Btu per Short Ton |
2011 | 19.341 | -0.282 | Million Btu per Short Ton |
2012 | 19.211 | -0.13 | Million Btu per Short Ton |
2013 | 19.174 | -0.036999999999999 | Million Btu per Short Ton |
2014 | 19.29 | + 0.116 | Million Btu per Short Ton |
2015 | 19.146 | -0.144 | Million Btu per Short Ton |
2016 | 19.153 | + 0.0069999999999979 | Million Btu per Short Ton |
2017 | 18.981 | -0.172 | Million Btu per Short Ton |
2018 | 18.915 | -0.066000000000003 | Million Btu per Short Ton |
2019 | 18.903 | -0.012 | Million Btu per Short Ton |
2020 | 18.856 | -0.046999999999997 | Million Btu per Short Ton |
2021 | 18.856 | 0 | Million Btu per Short Ton |