Year | Value | 2021 | 41,743.014280497 | 2020 | 36,801.281741814 | 2019 | 38,340.121999124 | 2018 | 39,046.701408538 | 2017 | 36,341.191073742 | 2016 | 34,528.49059494 | 2015 | 33,799.739833794 | 2014 | 39,529.631063782 | 2013 | 38,766.038043621 | 2012 | 36,945.840999246 | 2011 | 38,266.983742105 | 2010 | 36,326.639325881 | 2009 | 36,866.0491099 | 2008 | 40,409.157910922 | 2007 | 36,972.489124313 | 2006 | 32,327.931560204 | 2005 | 30,809.482644805 | 2004 | 29,772.014083438 | 2003 | 25,875.245727053 | 2002 | 21,180.862369109 | 2001 | 19,540.071280053 | 2000 | 19,849.086331872 | 1999 | 21,654.624705833 | 1998 | 21,830.1196617 | 1997 | 21,429.067451785 | 1996 | 23,714.323954279 | 1995 | 24,603.41061674 | 1994 | 21,122.53917652 | 1993 | 19,260.132868141 | 1992 | 20,048.890928919 | 1991 | 18,087.654765824 | 1990 | 17,687.372265519 | 1989 | 14,168.789978067 | 1988 | 14,090.041851421 | 1987 | 12,939.767731817 | 1986 | 10,345.014259075 | 1985 | 7,401.8773968463 | 1984 | 7,119.1628234831 | 1983 | 7,382.6505221396 | 1982 | 7,799.4405017652 | 1981 | 8,911.3754345282 | 1980 | 10,883.394724216 | 1979 | 10,239.078822427 | 1978 | 8,975.4787120254 | 1977 | 7,358.9728518628 | 1976 | 6,389.5774838489 | 1975 | 5,871.7841558445 | 1974 | 5,019.8833249827 | 1973 | 4,303.5704257011 | 1972 | 3,347.1556108891 | 1971 | 2,689.6992534376 | 1970 | 2,408.9542125244 |
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