| Year | Value | | 2014 | 5,002.4066798774 | | 2013 | 5,159.1836550379 | | 2012 | 5,397.7414773402 | | 2011 | 5,514.8036149679 | | 2010 | 5,493.7110367005 | | 2009 | 5,368.3905666713 | | 2008 | 5,757.9606114778 | | 2007 | 5,804.3259635674 | | 2006 | 5,833.46729676 | | 2005 | 5,731.1015568122 | | 2004 | 5,687.9975734557 | | 2003 | 5,652.5195424866 | | 2002 | 5,539.7038367667 | | 2001 | 5,406.491721677 | | 2000 | 5,299.8564787942 | | 1999 | 5,079.4924063692 | | 1998 | 4,955.721943958 | | 1997 | 4,791.2852459464 | | 1996 | 4,658.7001566172 | | 1995 | 4,597.8925979618 | | 1994 | 4,439.319252543 | | 1993 | 4,303.6453116644 | | 1992 | 4,310.5379682588 | | 1991 | 4,224.7401055429 | | 1990 | 4,144.9074423423 | | 1989 | 4,007.1795167334 | | 1988 | 3,825.9177830384 | | 1987 | 3,662.6665616761 | | 1986 | 3,490.343116065 | | 1985 | 3,391.6696268347 | | 1984 | 3,304.3274090236 | | 1983 | 3,134.3923353187 | | 1982 | 3,132.7712226336 | | 1981 | 3,096.9347368905 | | 1980 | 3,104.8545782327 | | 1979 | 3,040.9596093764 | | 1978 | 2,891.0441916246 | | 1977 | 2,776.8181347109 | | 1976 | 2,710.4579360518 | | 1975 | 2,476.3622143114 | | 1974 | 2,537.2853862509 | | 1973 | 2,457.7268390149 | | 1972 | 2,295.4930592467 | | 1971 | 2,152.773937839 | | 1970 | 2,072.912766841 | | 1969 | 1,934.8144633853 | | 1968 | 1,823.3987499002 | | 1967 | 1,693.254317067 | | 1966 | 1,573.2020792475 | | 1965 | 1,446.7395924383 | | 1964 | 1,353.3144913387 | | 1963 | 1,266.3505814407 | | 1962 | 1,143.6051293794 | | 1961 | 1,046.4151051669 | | 1960 | 975.02574716582 |
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