Year | Value | 2021 | 12,898,826.452 | 2020 | 10,438,219.906 | 2019 | 20,337,590.648128 | 2018 | 20,014,360.905764 | 2017 | 19,856,333.92 | 2016 | 19,781,310 | 2015 | 19,396,035 | 2014 | 19,202,136.98725 | 2013 | 19,289,671.063863 | 2012 | 19,344,793.670384 | 2011 | 19,559,119.977766 | 2010 | 19,410,119.832211 | 2009 | 17,494,249 | 2008 | 17,590,453 | 2007 | 18,271,239 | 2006 | 17,855,201 | 2005 | 17,822,494 | 2004 | 17,597,666 | 2003 | 15,869,640 | 2002 | 15,385,330 | 2001 | 16,714,073 | 2000 | 16,933,507 | 1999 | 15,678,400 | 1998 | 14,791,900 | 1997 | 14,686,400 | 1996 | 14,270,600 | 1995 | 13,485,000 | 1994 | 12,761,400 | 1993 | 11,684,200 | 1992 | 11,615,900 | 1991 | 11,229,100 | 1990 | 11,438,000 | 1989 | 10,937,400 | 1988 | 10,835,900 | 1987 | 10,310,800 | 1986 | 9,831,200 | 1985 | 9,092,400 | 1984 | 8,615,800 | 1983 | 8,142,800 | 1982 | 7,878,500 | 1981 | 7,901,900 | 1980 | 8,328,300 | 1979 | 8,387,000 | 1978 | 8,100,600 | 1977 | 7,898,000 | 1976 | 7,562,100 | 1975 | 7,372,300 | 1974 | 7,522,800 | 1973 | 8,109,600 | 1972 | 7,982,800 | 1971 | 7,996,500 | 1970 | 7,862,000 |
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