Year | Value | 2021 | 59,009.454837086 | 2020 | 53,874.65908077 | 2019 | 55,620.403897713 | 2018 | 53,858.129984878 | 2017 | 51,472.058012421 | 2016 | 49,564.351976754 | 2015 | 49,077.966343571 | 2014 | 47,633.251783604 | 2013 | 45,715.108371959 | 2012 | 44,760.645152407 | 2011 | 42,673.679289391 | 2010 | 41,128.274545457 | 2009 | 39,149.311147282 | 2008 | 40,165.550978894 | 2007 | 40,525.819747492 | 2006 | 39,721.62665009 | 2005 | 37,454.472246924 | 2004 | 35,535.186898493 | 2003 | 33,555.338957893 | 2002 | 32,505.703802484 | 2001 | 31,888.818031456 | 2000 | 31,166.938141241 | 1999 | 29,584.421583498 | 1998 | 28,277.595088484 | 1997 | 26,804.187221024 | 1996 | 25,325.97471245 | 1995 | 24,106.773225745 | 1994 | 23,103.561404024 | 1993 | 21,893.222604875 | 1992 | 21,195.537028015 | 1991 | 20,284.239923054 | 1990 | 19,905.262841246 | 1989 | 19,138.556894327 | 1988 | 18,162.287251898 | 1987 | 16,750.110972074 | 1986 | 15,855.901010614 | 1985 | 15,165.045482616 | 1984 | 14,283.904766829 | 1983 | 12,770.516486263 | 1982 | 12,043.706902865 | 1981 | 11,452.057497583 | 1980 | 10,117.118073558 | 1979 | 9,517.8410732066 | 1978 | 8,893.5742778885 | 1977 | 7,948.156400625 | 1976 | 7,209.0418693883 | 1975 | 6,530.8890966121 | 1974 | 6,121.8354941646 | 1973 | 5,879.2220974261 | 1972 | 5,308.0591462047 | 1971 | 4,862.8019568467 | 1970 | 4,553.4431664607 |
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