| Year | Value | | 2022 | 503,893 | | 2021 | 491,624 | | 2020 | 488,246 | | 2019 | 477,236 | | 2018 | 458,518 | | 2017 | 442,474 | | 2016 | 430,220 | | 2015 | 420,192 | | 2014 | 409,992 | | 2013 | 401,597 | | 2012 | 395,713 | | 2011 | 391,879 | | 2010 | 389,936 | | 2009 | 387,733 | | 2008 | 384,526 | | 2007 | 381,739 | | 2006 | 380,114 | | 2005 | 378,170 | | 2004 | 374,812 | | 2003 | 371,319 | | 2002 | 367,875 | | 2001 | 364,105 | | 2000 | 360,316 | | 1999 | 356,901 | | 1998 | 353,666 | | 1997 | 350,223 | | 1996 | 346,401 | | 1995 | 343,247 | | 1994 | 340,447 | | 1993 | 336,862 | | 1992 | 333,102 | | 1991 | 329,269 | | 1990 | 320,102 | | 1989 | 316,579 | | 1988 | 313,103 | | 1987 | 310,133 | | 1986 | 307,591 | | 1985 | 302,228 | | 1984 | 296,939 | | 1983 | 296,847 | | 1982 | 292,666 | | 1981 | 286,427 | | 1980 | 284,300 | | 1979 | 281,309 | | 1978 | 278,444 | | 1977 | 275,536 | | 1976 | 274,435 | | 1975 | 273,015 | | 1974 | 270,993 | | 1973 | 271,149 | | 1972 | 271,346 | | 1971 | 271,546 | | 1970 | 271,474 | | 1969 | 272,927 | | 1968 | 276,131 | | 1967 | 279,467 | | 1966 | 282,936 | | 1965 | 286,362 | | 1964 | 288,759 | | 1963 | 290,127 | | 1962 | 291,536 | | 1961 | 292,949 | | 1960 | 294,316 |
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