1949 | 24.793 | 0 | Million Btu per Short Ton |
1950 | 24.989 | + 0.196 | Million Btu per Short Ton |
1951 | 24.813 | -0.176 | Million Btu per Short Ton |
1952 | 24.901 | + 0.088000000000001 | Million Btu per Short Ton |
1953 | 25.006 | + 0.105 | Million Btu per Short Ton |
1954 | 24.913 | -0.093 | Million Btu per Short Ton |
1955 | 24.982 | + 0.068999999999999 | Million Btu per Short Ton |
1956 | 24.843 | -0.139 | Million Btu per Short Ton |
1957 | 24.905 | + 0.062000000000001 | Million Btu per Short Ton |
1958 | 24.716 | -0.189 | Million Btu per Short Ton |
1959 | 24.719 | + 0.0030000000000001 | Million Btu per Short Ton |
1960 | 24.713 | -0.0060000000000002 | Million Btu per Short Ton |
1961 | 24.653 | -0.060000000000002 | Million Btu per Short Ton |
1962 | 24.627 | -0.026 | Million Btu per Short Ton |
1963 | 24.588 | -0.038999999999998 | Million Btu per Short Ton |
1964 | 24.602 | + 0.013999999999999 | Million Btu per Short Ton |
1965 | 24.537 | -0.065000000000001 | Million Btu per Short Ton |
1966 | 24.396 | -0.141 | Million Btu per Short Ton |
1967 | 24.243 | -0.153 | Million Btu per Short Ton |
1968 | 24.186 | -0.056999999999999 | Million Btu per Short Ton |
1969 | 23.976 | -0.21 | Million Btu per Short Ton |
1970 | 23.44 | -0.536 | Million Btu per Short Ton |
1971 | 23.124 | -0.316 | Million Btu per Short Ton |
1972 | 23.036 | -0.087999999999997 | Million Btu per Short Ton |
1973 | 23.057 | + 0.020999999999997 | Million Btu per Short Ton |
1974 | 22.677 | -0.38 | Million Btu per Short Ton |
1975 | 22.506 | -0.171 | Million Btu per Short Ton |
1976 | 22.498 | -0.0079999999999991 | Million Btu per Short Ton |
1977 | 22.265 | -0.233 | Million Btu per Short Ton |
1978 | 22.017 | -0.248 | Million Btu per Short Ton |
1979 | 22.1 | + 0.083000000000002 | Million Btu per Short Ton |
1980 | 21.947 | -0.153 | Million Btu per Short Ton |
1981 | 21.713 | -0.234 | Million Btu per Short Ton |
1982 | 21.674 | -0.039000000000001 | Million Btu per Short Ton |
1983 | 21.576 | -0.097999999999999 | Million Btu per Short Ton |
1984 | 21.573 | -0.0030000000000001 | Million Btu per Short Ton |
1985 | 21.366 | -0.207 | Million Btu per Short Ton |
1986 | 21.462 | + 0.096 | Million Btu per Short Ton |
1987 | 21.517 | + 0.055 | Million Btu per Short Ton |
1988 | 21.328 | -0.189 | Million Btu per Short Ton |
1989 | 21.307 | -0.021000000000001 | Million Btu per Short Ton |
1990 | 21.197 | -0.11 | Million Btu per Short Ton |
1991 | 21.12 | -0.076999999999998 | Million Btu per Short Ton |
1992 | 21.068 | -0.052 | Million Btu per Short Ton |
1993 | 21.01 | -0.058 | Million Btu per Short Ton |
1994 | 20.929 | -0.081000000000003 | Million Btu per Short Ton |
1995 | 20.88 | -0.048999999999999 | Million Btu per Short Ton |
1996 | 20.87 | -0.009999999999998 | Million Btu per Short Ton |
1997 | 20.83 | -0.040000000000003 | Million Btu per Short Ton |
1998 | 20.881 | + 0.051000000000002 | Million Btu per Short Ton |
1999 | 20.818 | -0.062999999999999 | Million Btu per Short Ton |
2000 | 20.828 | + 0.009999999999998 | Million Btu per Short Ton |
2001 | 20.671 | -0.157 | Million Btu per Short Ton |
2002 | 20.541 | -0.13 | Million Btu per Short Ton |
2003 | 20.387 | -0.154 | Million Btu per Short Ton |
2004 | 20.29 | -0.097000000000001 | Million Btu per Short Ton |
2005 | 20.246 | -0.044 | Million Btu per Short Ton |
2006 | 20.181 | -0.064999999999998 | Million Btu per Short Ton |
2007 | 20.168 | -0.013000000000002 | Million Btu per Short Ton |
2008 | 19.979 | -0.189 | Million Btu per Short Ton |
2009 | 19.741 | -0.238 | Million Btu per Short Ton |
2010 | 19.87 | + 0.129 | Million Btu per Short Ton |
2011 | 19.6 | -0.27 | Million Btu per Short Ton |
2012 | 19.544 | -0.056000000000001 | Million Btu per Short Ton |
2013 | 19.513 | -0.030999999999999 | Million Btu per Short Ton |
2014 | 19.611 | + 0.097999999999999 | Million Btu per Short Ton |
2015 | 19.482 | -0.129 | Million Btu per Short Ton |
2016 | 19.459 | -0.023 | Million Btu per Short Ton |
2017 | 19.303 | -0.156 | Million Btu per Short Ton |
2018 | 19.258 | -0.045000000000002 | Million Btu per Short Ton |
2019 | 19.292 | + 0.034000000000002 | Million Btu per Short Ton |
2020 | 19.236 | -0.056000000000001 | Million Btu per Short Ton |
2021 | 19.236 | 0 | Million Btu per Short Ton |