Year | Value | 2021 | 1,274.0726280751 | 2020 | 1,218.1521283812 | 2019 | 1,252.176390285 | 2018 | 1,231.4814049354 | 2017 | 1,216.1231452188 | 2016 | 1,196.1054325914 | 2015 | 1,182.2617527319 | 2014 | 1,213.734265096 | 2013 | 1,127.352036192 | 2012 | 1,050.97382962 | 2011 | 997.52321447033 | 2010 | 1,026.2080022465 | 2009 | 928.42761189948 | 2008 | 926.50379713089 | 2007 | 794.35873321894 | 2006 | 699.63544187701 | 2005 | 588.60841048898 | 2004 | 522.13752455202 | 2003 | 454.58586297177 | 2002 | 423.01913666983 | 2001 | 403.77278634825 | 2000 | 409.59885130984 | 1999 | 390.95959103525 | 1998 | 381.77490997948 | 1997 | 381.6305141274 | 1996 | 377.03442876331 | 1995 | 344.21590030815 | 1994 | 304.28031706021 | 1993 | 321.80518752948 | 1992 | 350.96172973924 | 1991 | 364.20463831058 | 1990 | 362.37615677331 | 1989 | 345.21513082956 | 1988 | 372.89975241268 | 1987 | 365.24188776928 | 1986 | 360.71346704298 | 1985 | 373.50681835433 | 1984 | 375.07043474136 | 1983 | 420.40433497237 | 1982 | 524.38542479476 | 1981 | 573.4692049228 | 1980 | 354.403344419 | 1979 | 287.88757114359 | 1978 | 271.31664880041 | 1977 | 240.25111058191 | 1976 | 234.84935733599 | 1975 | 238.52654465774 | 1974 | 196.33586132569 | 1973 | 151.99189862235 |
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