| Year | Value | | 2023 | 389,625 | | 2022 | 375,374 | | 2021 | 352,536 | | 2020 | 320,368 | | 2019 | 287,512 | | 2018 | 252,153 | | 2017 | 214,484 | | 2016 | 177,017 | | 2015 | 141,837 | | 2014 | 110,162 | | 2013 | 82,208 | | 2012 | 57,964 | | 2011 | 37,679 | | 2010 | 21,356 | | 2009 | 20,577 | | 2008 | 41,533 | | 2007 | 70,322 | | 2006 | 93,544 | | 2005 | 102,846 | | 2004 | 100,014 | | 2003 | 93,986 | | 2002 | 88,578 | | 2001 | 83,595 | | 2000 | 78,665 | | 1999 | 73,456 | | 1998 | 67,831 | | 1997 | 61,873 | | 1996 | 55,902 | | 1995 | 50,011 | | 1994 | 44,894 | | 1993 | 41,189 | | 1992 | 38,486 | | 1991 | 36,314 | | 1990 | 34,202 | | 1989 | 31,874 | | 1988 | 29,310 | | 1987 | 26,597 | | 1986 | 23,869 | | 1985 | 21,507 | | 1984 | 19,783 | | 1983 | 18,574 | | 1982 | 17,674 | | 1981 | 16,848 | | 1980 | 15,383 | | 1979 | 13,511 | | 1978 | 12,111 | | 1977 | 11,194 | | 1976 | 10,570 | | 1975 | 9,425 | | 1974 | 7,760 |
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