Year | Value | 2021 | 56,117.828558989 | 2020 | 46,590.461665119 | 2019 | 61,404.684745681 | 2018 | 59,885.633937201 | 2017 | 55,754.865144956 | 2016 | 49,241.230916967 | 2015 | 46,345.74631736 | 2014 | 44,664.802349533 | 2013 | 41,697.299386573 | 2012 | 39,803.686816416 | 2011 | 40,147.943377625 | 2010 | 40,166.457361276 | 2009 | 32,206.223 | 2008 | 30,033.78 | 2007 | 28,655.998 | 2006 | 25,504.911 | 2005 | 24,416.51 | 2004 | 23,565.768 | 2003 | 20,230.393 | 2002 | 18,860.473 | 2001 | 18,122.923000095 | 2000 | 18,627.697 | 1999 | 16,560.418930221 | 1998 | 15,649.173828224 | 1997 | 15,879.500058077 | 1996 | 13,910.199997745 | 1995 | 13,562.700098701 | 1994 | 12,930.599908225 | 1993 | 11,382.000077583 | 1992 | 9,844.6000796327 | 1991 | 8,878.1999315916 | 1990 | 8,725.4000633206 | 1989 | 8,370.7000142857 | 1988 | 8,011.199976079 | 1987 | 7,459.2000251341 | 1986 | 6,505.1000562834 | 1985 | 6,215.7000286729 | 1984 | 6,268.0000486453 | 1983 | 5,611.4999636485 | 1982 | 5,276.8000361397 | 1981 | 5,005.6000062898 | 1980 | 4,525.2999770118 | 1979 | 4,097.8000333982 | 1978 | 3,829.200000495 | 1977 | 3,465.9999870958 | 1976 | 3,152.300027505 | 1975 | 2,693.7999977551 | 1974 | 2,358.6999970747 |
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