Year | Value | 2021 | 1,306.1862688282 | 2020 | 1,228.8056819275 | 2019 | 1,313.8986830576 | 2018 | 1,319.431599458 | 2017 | 1,313.1901517713 | 2016 | 1,260.5706333214 | 2015 | 1,379.5406479515 | 2014 | 1,544.103479338 | 2013 | 1,470.1025341349 | 2012 | 1,399.9557892054 | 2011 | 1,353.9769400442 | 2010 | 1,253.0174745883 | 2009 | 1,116.4357311408 | 2008 | 1,115.9043615538 | 2007 | 1,047.9130794053 | 2006 | 958.60422915989 | 2005 | 820.69438613343 | 2004 | 723.52773409492 | 2003 | 599.75159772856 | 2002 | 486.64427071491 | 2001 | 455.91545156686 | 2000 | 487.03818253817 | 1999 | 493.61676385195 | 1998 | 495.33514775797 | 1997 | 518.88935651162 | 1996 | 510.08256378477 | 1995 | 503.45958121415 | 1994 | 442.14325269766 | 1993 | 466.62386726611 | 1992 | 514.52975109203 | 1991 | 531.85029349569 | 1990 | 519.81033525606 | 1989 | 473.36898947606 | 1988 | 502.08282799359 | 1987 | 489.75594767382 | 1986 | 449.51824223213 | 1985 | 451.64158043757 | 1984 | 512.12309558862 | 1983 | 606.51023102363 | 1982 | 723.40968057231 | 1981 | 813.20891628902 | 1980 | 526.22274210711 | 1979 | 403.06225475988 | 1978 | 369.23885988135 | 1977 | 335.85377118729 | 1976 | 327.01288409021 | 1975 | 312.09355962249 | 1974 | 290.48049330443 | 1973 | 238.58130195487 | 1972 | 191.35938368669 | 1971 | 175.57978852954 |
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