| Year | Value | | 2022 | 710,263 | | 2021 | 692,662 | | 2020 | 668,131 | | 2019 | 639,294 | | 2018 | 609,556 | | 2017 | 579,106 | | 2016 | 549,853 | | 2015 | 523,952 | | 2014 | 499,615 | | 2013 | 477,251 | | 2012 | 457,720 | | 2011 | 440,037 | | 2010 | 425,117 | | 2009 | 412,548 | | 2008 | 400,976 | | 2007 | 389,618 | | 2006 | 378,000 | | 2005 | 366,054 | | 2004 | 353,785 | | 2003 | 341,805 | | 2002 | 331,013 | | 2001 | 321,009 | | 2000 | 311,407 | | 1999 | 302,308 | | 1998 | 292,696 | | 1997 | 282,034 | | 1996 | 270,318 | | 1995 | 257,349 | | 1994 | 243,424 | | 1993 | 228,391 | | 1992 | 213,806 | | 1991 | 201,542 | | 1990 | 191,492 | | 1989 | 183,472 | | 1988 | 184,223 | | 1987 | 186,468 | | 1986 | 180,042 | | 1985 | 171,746 | | 1984 | 164,510 | | 1983 | 158,492 | | 1982 | 153,763 | | 1981 | 150,165 | | 1980 | 147,577 | | 1979 | 146,109 | | 1978 | 145,904 | | 1977 | 147,049 | | 1976 | 149,493 | | 1975 | 148,049 | | 1974 | 142,156 | | 1973 | 136,401 | | 1972 | 130,838 | | 1971 | 125,526 | | 1970 | 120,541 | | 1969 | 115,917 | | 1968 | 111,608 | | 1967 | 107,511 | | 1966 | 103,566 | | 1965 | 99,777 | | 1964 | 96,136 | | 1963 | 92,348 | | 1962 | 88,417 | | 1961 | 84,662 | | 1960 | 81,117 |
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