Year | Value | 2021 | 33,883.971239724 | 2020 | 26,849.546412914 | 2019 | 31,156.157419471 | 2018 | 31,431.520279652 | 2017 | 31,279.548103548 | 2016 | 28,003.885164942 | 2015 | 27,730.098647157 | 2014 | 27,911.046481026 | 2013 | 27,505.098000224 | 2012 | 27,063.386880028 | 2011 | 28,747.531473159 | 2010 | 28,325.871104881 | 2009 | 33,977.24 | 2008 | 30,005.916 | 2007 | 30,573.86 | 2006 | 29,273.066 | 2005 | 28,028.166 | 2004 | 27,568.053 | 2003 | 25,036.859 | 2002 | 24,512.743 | 2001 | 24,047.926 | 2000 | 25,168.637 | 1999 | 22,225.31918538 | 1998 | 20,894.373809817 | 1997 | 21,415.699996069 | 1996 | 18,486.299779907 | 1995 | 17,771.299979217 | 1994 | 16,228.999782115 | 1993 | 14,224.199993432 | 1992 | 13,410.69987984 | 1991 | 13,067.600232601 | 1990 | 13,342.600190163 | 1989 | 12,764.900054932 | 1988 | 11,804.600119114 | 1987 | 10,795.60009861 | 1986 | 9,793.3998622895 | 1985 | 8,943.2000412942 | 1984 | 8,528.0000152589 | 1983 | 7,520.8999240398 | 1982 | 6,635.6000835896 | 1981 | 6,351.9998884202 | 1980 | 6,085.200067997 | 1979 | 5,909.599978447 | 1978 | 5,371.7000672816 | 1977 | 4,937.2000036241 | 1976 | 4,219.80004406 | 1975 | 3,602.6000248192 | 1974 | 3,627.9999970198 | 1973 | 3,171.7999689579 | 1972 | 2,607.8999850751 | 1971 | 2,242.1000465156 | 1970 | 2,043.6000158788 |
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