| Year | Value | | 2021 | 14,754,847 | | 2020 | 31,771,202 | | 2019 | 53,227,026 | | 2018 | 47,049,671 | | 2017 | 42,592,762 | | 2016 | 37,349,272 | | 2015 | 29,944,771 | | 2014 | 23,826,013.272 | | 2013 | 20,429,309.908 | | 2012 | 16,976,051.381216 | | 2011 | 16,544,477.83017 | | 2010 | 14,377,619 | | 2009 | 11,073,604 | | 2008 | 9,991,145 | | 2007 | 7,194,443 | | 2006 | 5,283,831 | | 2005 | 5,453,683 | | 2004 | 5,049,706 | | 2003 | 3,969,320 | | 2002 | 4,038,133 | | 2001 | 3,427,176 | | 2000 | 2,877,894 | | 1999 | 2,600,000 | | 1998 | 2,303,500 | | 1997 | 2,527,300 | | 1996 | 2,107,500 | | 1995 | 2,290,000 | | 1994 | 1,670,000 | | 1993 | 1,200,000 | | 1992 | 204,200 | | 1991 | 198,000 | | 1990 | 89,000 | | 1989 | 88,200 | | 1988 | 87,800 | | 1987 | 87,000 | | 1986 | 88,000 | | 1985 | 84,000 | | 1984 | 74,000 | | 1983 | 11,500 | | 1982 | 27,000 | | 1981 | 27,000 | | 1980 | 6,000 | | 1975 | 165,000 | | 1974 | 552,600 | | 1973 | 664,700 | | 1972 | 854,400 | | 1971 | 1,051,300 | | 1970 | 1,525,600 |
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