Year | Value | 2014 | 278.89125333612 | 2013 | 275.89137411142 | 2012 | 274.44775294825 | 2011 | 275.9110848198 | 2010 | 271.06323680522 | 2009 | 248.45103827196 | 2008 | 244.70714043706 | 2007 | 243.82398168912 | 2006 | 238.56667850713 | 2005 | 226.78936637804 | 2004 | 217.02346927404 | 2003 | 202.13454897795 | 2002 | 194.31702742719 | 2001 | 189.82684922578 | 2000 | 181.14517122421 | 1999 | 174.56800324031 | 1998 | 163.85155814347 | 1997 | 165.83247002811 | 1996 | 167.31738787466 | 1995 | 166.44388971677 | 1994 | 161.78074542411 | 1993 | 160.69105860657 | 1992 | 170.1405765585 | 1991 | 170.56052889306 | 1990 | 172.82029508566 | 1989 | 109.84868762299 | 1988 | 106.90177156202 | 1987 | 103.38266065464 | 1986 | 101.10608466627 | 1985 | 95.977574180597 | 1984 | 90.148022987707 | 1983 | 92.167312618934 | 1982 | 95.322515929151 | 1981 | 92.336613785486 | 1980 | 89.715308888867 | 1979 | 87.088473018494 | 1978 | 84.781406783839 | 1977 | 84.389706139406 | 1976 | 83.704545312039 | 1975 | 81.81078677838 | 1974 | 81.713628038134 | 1973 | 77.420876613797 | 1972 | 72.464317344157 | 1971 | 68.64530788526 |
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