| Year | Value | | 2021 | 9,015.3480041368 | | 2020 | 7,510.4426556939 | | 2019 | 7,470.1138148591 | | 2018 | 7,331.8598060105 | | 2017 | 6,658.9437347348 | | 2016 | 6,078.4852215041 | | 2015 | 6,012.7186486535 | | 2014 | 5,753.4086678021 | | 2013 | 5,239.7851340074 | | 2012 | 4,770.2631822821 | | 2011 | 4,132.6722008801 | | 2010 | 3,487.2589929555 | | 2009 | 3,041.7821389815 | | 2008 | 2,703.0967889888 | | 2007 | 2,168.1968899697 | | 2006 | 1,700.9740056571 | | 2005 | 1,428.7871446123 | | 2004 | 1,246.4715169868 | | 2003 | 1,084.0777355584 | | 2002 | 965.11361914361 | | 2001 | 876.8712485553 | | 2000 | 798.02538340599 | | 1999 | 733.23273878001 | | 1998 | 699.72978794022 | | 1997 | 666.8033694208 | | 1996 | 604.91114215549 | | 1995 | 520.40593198924 | | 1994 | 411.63175357181 | | 1993 | 327.68205520572 | | 1992 | 321.18792797578 | | 1991 | 289.24436566096 | | 1990 | 270.42144803031 | | 1989 | 268.55696427015 | | 1988 | 247.82398055965 | | 1987 | 216.84556184035 | | 1986 | 244.98059829246 | | 1985 | 250.56151936379 | | 1984 | 210.70538080095 | | 1983 | 185.57422380315 | | 1982 | 162.39617324972 | | 1981 | 153.11972180272 | | 1980 | 150.78089821107 | | 1979 | 147.38523923725 | | 1978 | 131.67051347628 | | 1977 | 157.51540356752 | | 1976 | 140.86349623694 | | 1975 | 154.99273721737 | | 1974 | 141.62705023621 | | 1973 | 142.47829068726 | | 1972 | 119.813329244 | | 1971 | 108.43535935457 | | 1970 | 103.35963015151 |
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