Year | Value | 2023 | 428,574 | 2022 | 421,266 | 2021 | 411,117 | 2020 | 399,007 | 2019 | 386,850 | 2018 | 374,378 | 2017 | 361,359 | 2016 | 347,899 | 2015 | 334,448 | 2014 | 321,906 | 2013 | 311,243 | 2012 | 303,439 | 2011 | 299,250 | 2010 | 298,794 | 2009 | 301,563 | 2008 | 302,884 | 2007 | 303,866 | 2006 | 306,859 | 2005 | 309,012 | 2004 | 311,106 | 2003 | 313,922 | 2002 | 317,834 | 2001 | 322,455 | 2000 | 326,543 | 1999 | 328,343 | 1998 | 327,559 | 1997 | 322,689 | 1996 | 311,581 | 1995 | 293,557 | 1994 | 269,182 | 1993 | 242,756 | 1992 | 219,409 | 1991 | 200,816 | 1990 | 185,882 | 1989 | 174,321 | 1988 | 165,578 | 1987 | 157,284 | 1986 | 146,592 | 1985 | 132,365 | 1984 | 116,361 | 1983 | 101,578 | 1982 | 92,066 | 1981 | 91,858 | 1980 | 102,310 | 1979 | 121,126 | 1978 | 142,090 | 1977 | 158,933 | 1976 | 170,611 | 1975 | 178,823 | 1974 | 182,644 |
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