Year | Value | 2021 | 46,419.707121212 | 2020 | 41,293.757374459 | 2019 | 42,706.659125801 | 2018 | 43,940.042396275 | 2017 | 40,003.301819298 | 2016 | 37,170.143763858 | 2015 | 36,999.532440241 | 2014 | 43,058.080456134 | 2013 | 42,399.313948912 | 2012 | 40,527.215084132 | 2011 | 44,453.574188197 | 2010 | 41,485.072690131 | 2009 | 41,457.631379076 | 2008 | 45,441.874314304 | 2007 | 42,859.083277704 | 2006 | 37,261.556017323 | 2005 | 34,410.375700322 | 2004 | 33,160.504891347 | 2003 | 29,386.405683183 | 2002 | 23,744.078319206 | 2001 | 21,894.760302732 | 2000 | 21,979.62974148 | 1999 | 23,844.124513302 | 1998 | 23,160.033593154 | 1997 | 22,413.370053361 | 1996 | 24,320.397274627 | 1995 | 24,342.433899435 | 1994 | 20,271.84787715 | 1993 | 18,777.693026154 | 1992 | 19,305.40180287 | 1991 | 17,656.30322194 | 1990 | 17,198.460273878 | 1989 | 14,326.889931141 | 1988 | 14,596.239161649 | 1987 | 13,835.520511877 | 1986 | 11,317.881420822 | 1985 | 8,111.3861811044 | 1984 | 8,295.5646708165 | 1983 | 8,836.1978715121 | 1982 | 9,145.3612393477 | 1981 | 9,497.4642314009 | 1980 | 11,501.440095393 | 1979 | 10,810.745531893 | 1978 | 9,520.8700036541 | 1977 | 7,873.7592040902 | 1976 | 6,788.3360038965 | 1975 | 6,220.9115580355 | 1974 | 5,435.4912638361 | 1973 | 4,704.2237122559 | 1972 | 3,554.2641980725 | 1971 | 2,923.6585069788 | 1970 | 2,561.716875421 |
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