Year | Value | 2021 | 1,135.4204480682 | 2020 | 1,092.155400546 | 2019 | 1,098.2063334361 | 2018 | 1,046.4485591498 | 2017 | 1,064.4842725709 | 2016 | 994.87445953657 | 2015 | 935.16255938846 | 2014 | 936.32980918227 | 2013 | 879.88665488943 | 2012 | 825.06040587518 | 2011 | 811.72596412995 | 2010 | 932.30818358979 | 2009 | 851.84241541258 | 2008 | 817.71271788965 | 2007 | 690.78257710109 | 2006 | 601.26256173175 | 2005 | 535.70300677712 | 2004 | 482.51099379139 | 2003 | 428.14598279644 | 2002 | 403.08282424935 | 2001 | 396.13767076125 | 2000 | 404.35406223735 | 1999 | 382.6282420467 | 1998 | 375.31961543547 | 1997 | 369.20891629864 | 1996 | 360.83220649331 | 1995 | 326.46507887928 | 1994 | 294.71087750594 | 1993 | 324.0147557195 | 1992 | 334.15066342816 | 1991 | 348.20998184005 | 1990 | 348.17678515174 | 1989 | 329.35412749719 | 1988 | 340.87152281485 | 1987 | 333.23607480185 | 1986 | 313.51265046603 | 1985 | 295.3518923517 | 1984 | 282.02672686582 | 1983 | 280.51508713376 | 1982 | 288.10800579455 | 1981 | 303.47638075783 | 1980 | 307.90022819354 |
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