| Year | Value | | 2022 | 508,943 | | 2021 | 502,007 | | 2020 | 492,203 | | 2019 | 481,740 | | 2018 | 472,596 | | 2017 | 465,234 | | 2016 | 459,269 | | 2015 | 453,860 | | 2014 | 447,759 | | 2013 | 439,739 | | 2012 | 429,518 | | 2011 | 416,834 | | 2010 | 405,258 | | 2009 | 397,378 | | 2008 | 392,257 | | 2007 | 389,689 | | 2006 | 388,829 | | 2005 | 388,331 | | 2004 | 386,001 | | 2003 | 381,308 | | 2002 | 374,997 | | 2001 | 366,979 | | 2000 | 357,345 | | 1999 | 346,790 | | 1998 | 335,537 | | 1997 | 323,424 | | 1996 | 310,864 | | 1995 | 297,697 | | 1994 | 283,733 | | 1993 | 269,223 | | 1992 | 254,514 | | 1991 | 240,018 | | 1990 | 226,563 | | 1989 | 214,622 | | 1988 | 203,451 | | 1987 | 193,906 | | 1986 | 187,079 | | 1985 | 182,121 | | 1984 | 178,520 | | 1983 | 176,488 | | 1982 | 174,490 | | 1981 | 170,957 | | 1980 | 166,405 | | 1979 | 161,241 | | 1978 | 155,534 | | 1977 | 149,723 | | 1976 | 144,527 | | 1975 | 140,326 | | 1974 | 137,170 | | 1973 | 135,254 | | 1972 | 134,244 | | 1971 | 133,067 | | 1970 | 131,177 | | 1969 | 128,764 | | 1968 | 125,880 | | 1967 | 122,702 | | 1966 | 119,834 | | 1965 | 117,726 | | 1964 | 116,351 | | 1963 | 115,409 | | 1962 | 114,781 | | 1961 | 114,276 | | 1960 | 113,775 |
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