| Year | Value | | 2023 | 395,993 | | 2022 | 408,705 | | 2021 | 418,954 | | 2020 | 424,284 | | 2019 | 421,989 | | 2018 | 415,700 | | 2017 | 409,216 | | 2016 | 402,917 | | 2015 | 396,242 | | 2014 | 388,048 | | 2013 | 377,115 | | 2012 | 362,629 | | 2011 | 344,429 | | 2010 | 322,936 | | 2009 | 289,465 | | 2008 | 245,109 | | 2007 | 203,317 | | 2006 | 169,930 | | 2005 | 148,465 | | 2004 | 134,838 | | 2003 | 123,557 | | 2002 | 114,141 | | 2001 | 106,334 | | 2000 | 99,777 | | 1999 | 94,157 | | 1998 | 89,333 | | 1997 | 85,306 | | 1996 | 82,192 | | 1995 | 78,582 | | 1994 | 74,430 | | 1993 | 71,023 | | 1992 | 67,985 | | 1991 | 64,900 | | 1990 | 61,425 | | 1989 | 57,530 | | 1988 | 53,468 | | 1987 | 49,538 | | 1986 | 46,014 | | 1985 | 42,339 | | 1984 | 38,404 | | 1983 | 34,607 | | 1982 | 30,720 | | 1981 | 26,840 | | 1980 | 23,208 | | 1979 | 20,052 | | 1978 | 17,310 | | 1977 | 14,730 | | 1976 | 12,320 | | 1975 | 10,641 | | 1974 | 9,743 |
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