| Year | Value | | 2024 | 554,848 | | 2023 | 533,822 | | 2022 | 511,749 | | 2021 | 485,570 | | 2020 | 458,367 | | 2019 | 431,672 | | 2018 | 402,927 | | 2017 | 374,129 | | 2016 | 346,402 | | 2015 | 319,957 | | 2014 | 296,337 | | 2013 | 275,448 | | 2012 | 255,930 | | 2011 | 237,306 | | 2010 | 219,841 | | 2009 | 204,852 | | 2008 | 192,804 | | 2007 | 184,377 | | 2006 | 179,474 | | 2005 | 178,493 | | 2004 | 181,390 | | 2003 | 186,612 | | 2002 | 192,742 | | 2001 | 199,735 | | 2000 | 207,178 | | 1999 | 213,727 | | 1998 | 218,773 | | 1997 | 222,323 | | 1996 | 224,719 | | 1995 | 225,905 | | 1994 | 225,823 | | 1993 | 219,433 | | 1992 | 209,744 | | 1991 | 198,672 | | 1990 | 184,156 | | 1989 | 170,469 | | 1988 | 163,156 | | 1987 | 161,064 | | 1986 | 156,999 | | 1985 | 151,337 | | 1984 | 145,393 | | 1983 | 139,232 | | 1982 | 132,318 | | 1981 | 125,701 | | 1980 | 113,192 | | 1979 | 103,497 | | 1978 | 105,657 | | 1977 | 108,502 | | 1976 | 108,661 | | 1975 | 107,655 |
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