Year | Value | 2021 | 1,561.7293122748 | 2020 | 1,479.8375818822 | 2019 | 1,568.0400177895 | 2018 | 1,606.3858559297 | 2017 | 1,524.0168829204 | 2016 | 1,600.1572028098 | 2015 | 1,674.5182604034 | 2014 | 1,764.8740011147 | 2013 | 1,618.6703488081 | 2012 | 1,499.3702360632 | 2011 | 1,366.8056977342 | 2010 | 1,230.8385926396 | 2009 | 1,098.9446203434 | 2008 | 1,155.0141688865 | 2007 | 1,009.0929153965 | 2006 | 901.65641152614 | 2005 | 705.00680926404 | 2004 | 612.28571878581 | 2003 | 518.69913457164 | 2002 | 474.25284273516 | 2001 | 432.40924709366 | 2000 | 434.39528011311 | 1999 | 419.51327697228 | 1998 | 407.61838533657 | 1997 | 416.6230038723 | 1996 | 417.7073863473 | 1995 | 386.00190543521 | 1994 | 332.43240574223 | 1993 | 334.07327299666 | 1992 | 391.42958157962 | 1991 | 404.18116555811 | 1990 | 400.30582078538 | 1989 | 385.02712300726 | 1988 | 436.75957859014 | 1987 | 429.50480647566 | 1986 | 445.73683235244 | 1985 | 501.01236241215 | 1984 | 523.21767577562 | 1983 | 633.20932309072 | 1982 | 871.74477698458 | 1981 | 973.18813530829 | 1980 | 452.33717524481 | 1979 | 341.91548596055 | 1978 | 335.32810411622 | 1977 | 304.82091595542 | 1976 | 305.22600982279 | 1975 | 259.74932783492 | 1974 | 216.96037916867 | 1973 | 170.36323301162 | 1972 | 170.94415576837 | 1971 | 159.50437182287 | 1970 | 184.0596249256 |
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