| Year | Value | | 2021 | 1,949,936 | | 2020 | 1,460,077 | | 2019 | 6,752,002 | | 2018 | 6,442,442 | | 2017 | 6,230,157 | | 2016 | 6,093,416 | | 2015 | 5,400,896 | | 2014 | 5,021,288.9633442 | | 2013 | 4,492,436.9633442 | | 2012 | 4,082,595 | | 2011 | 3,543,663 | | 2010 | 3,372,283 | | 2009 | 4,370,917 | | 2008 | 2,884,506 | | 2007 | 2,813,018 | | 2006 | 2,899,722 | | 2005 | 3,037,298 | | 2004 | 3,236,364 | | 2003 | 3,292,815 | | 2002 | 3,002,232 | | 2001 | 3,419,249 | | 2000 | 2,997,480 | | 1999 | 2,936,800 | | 1998 | 3,381,800 | | 1997 | 3,517,700 | | 1996 | 3,494,100 | | 1995 | 3,477,800 | | 1994 | 3,241,000 | | 1993 | 3,254,500 | | 1992 | 3,551,100 | | 1991 | 3,385,000 | | 1990 | 3,748,000 | | 1989 | 3,862,300 | | 1988 | 3,655,000 | | 1987 | 3,566,900 | | 1986 | 3,689,900 | | 1985 | 3,965,900 | | 1984 | 3,781,000 | | 1983 | 3,410,500 | | 1982 | 3,150,000 | | 1981 | 3,000,000 | | 1980 | 2,950,000 | | 1979 | 2,663,400 | | 1978 | 2,229,000 | | 1977 | 1,997,100 | | 1976 | 1,681,600 | | 1975 | 1,618,000 | | 1974 | 1,252,100 | | 1973 | 1,053,600 | | 1972 | 843,900 | | 1971 | 714,800 | | 1970 | 563,200 |
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