Year | Value | 2014 | 314.39019661024 | 2013 | 313.31392524837 | 2012 | 308.53530965891 | 2011 | 310.41154261285 | 2010 | 307.3317899988 | 2009 | 289.97512039822 | 2008 | 287.35503702269 | 2007 | 295.93850877747 | 2006 | 293.85182924233 | 2005 | 284.19762974783 | 2004 | 274.03075193604 | 2003 | 259.69659469814 | 2002 | 252.28526028721 | 2001 | 245.58153002879 | 2000 | 240.78195285784 | 1999 | 236.16049646093 | 1998 | 229.55715069429 | 1997 | 236.27881411031 | 1996 | 237.49436471642 | 1995 | 237.60999170696 | 1994 | 236.6946227768 | 1993 | 238.33580442307 | 1992 | 246.41292560871 | 1991 | 248.07376553406 | 1990 | 248.38869462139 | 1989 | 145.67822808174 | 1988 | 140.45390434293 | 1987 | 134.72055212107 | 1986 | 130.74680478513 | 1985 | 124.44342107564 | 1984 | 113.70422530796 | 1983 | 116.26424671565 | 1982 | 117.30023969394 | 1981 | 108.95655365499 | 1980 | 107.29143940025 | 1979 | 104.32129986457 | 1978 | 99.529680641293 | 1977 | 98.016322050333 | 1976 | 97.425001623441 | 1975 | 94.917251168195 | 1974 | 91.162835506821 | 1973 | 86.942232258941 | 1972 | 81.413084599825 | 1971 | 76.029134455919 |
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