| Year | Value | | 2023 | 305,241 | | 2022 | 304,883 | | 2021 | 303,543 | | 2020 | 301,226 | | 2019 | 298,378 | | 2018 | 295,169 | | 2017 | 291,391 | | 2016 | 286,867 | | 2015 | 281,792 | | 2014 | 276,238 | | 2013 | 269,974 | | 2012 | 263,044 | | 2011 | 255,803 | | 2010 | 248,102 | | 2009 | 240,220 | | 2008 | 232,596 | | 2007 | 225,375 | | 2006 | 218,637 | | 2005 | 212,653 | | 2004 | 207,799 | | 2003 | 203,945 | | 2002 | 201,321 | | 2001 | 199,412 | | 2000 | 197,260 | | 1999 | 194,879 | | 1998 | 192,502 | | 1997 | 190,155 | | 1996 | 187,750 | | 1995 | 185,035 | | 1994 | 181,838 | | 1993 | 178,092 | | 1992 | 173,652 | | 1991 | 168,460 | | 1990 | 162,684 | | 1989 | 156,680 | | 1988 | 150,799 | | 1987 | 145,272 | | 1986 | 140,201 | | 1985 | 135,551 | | 1984 | 131,230 | | 1983 | 127,078 | | 1982 | 123,064 | | 1981 | 119,093 | | 1980 | 115,120 | | 1979 | 111,427 | | 1978 | 107,767 | | 1977 | 103,611 | | 1976 | 99,098 | | 1975 | 94,587 | | 1974 | 90,020 |
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