Year | Value | 2021 | 42,000.913461207 | 2020 | 34,972.782942449 | 2019 | 37,803.077322944 | 2018 | 37,836.008036254 | 2017 | 36,906.14912639 | 2016 | 34,319.795653341 | 2015 | 35,365.69401949 | 2014 | 41,604.080514203 | 2013 | 43,052.13483732 | 2012 | 43,023.425828351 | 2011 | 42,617.841264347 | 2010 | 38,679.332803137 | 2009 | 32,987.199662901 | 2008 | 37,787.351624233 | 2007 | 36,533.763054977 | 2006 | 33,132.80795831 | 2005 | 29,228.971625246 | 2004 | 26,001.660174329 | 2003 | 22,685.430543185 | 2002 | 19,536.53277255 | 2001 | 18,986.154174267 | 2000 | 19,386.445409693 | 1999 | 17,868.200033476 | 1998 | 16,794.229268229 | 1997 | 17,542.888960406 | 1996 | 17,002.699841705 | 1995 | 16,619.926578407 | 1994 | 16,017.944157 | 1993 | 16,170.209939432 | 1992 | 16,735.091101731 | 1991 | 17,586.476602072 | 1990 | 17,207.343172986 | 1989 | 16,740.828939883 | 1988 | 15,354.498047789 | 1987 | 13,252.829639081 | 1986 | 11,704.987163297 | 1985 | 11,332.258972115 | 1984 | 11,097.10982405 | 1983 | 10,706.574850716 | 1982 | 9,873.0779070175 | 1981 | 9,752.9384584914 | 1980 | 8,745.6048211327 | 1979 | 7,922.7628409308 | 1978 | 7,439.3067452062 | 1977 | 7,288.6314121786 | 1976 | 7,231.9245974874 | 1975 | 6,148.6250438164 | 1974 | 5,712.9461830438 | 1973 | 4,839.6896675776 | 1972 | 4,257.4510460599 | 1971 | 3,758.3077377875 | 1970 | 3,414.6222937994 |
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