| Year | Value | | 2022 | 579,427 | | 2021 | 565,644 | | 2020 | 550,607 | | 2019 | 535,121 | | 2018 | 518,995 | | 2017 | 501,468 | | 2016 | 482,541 | | 2015 | 463,299 | | 2014 | 444,289 | | 2013 | 425,209 | | 2012 | 408,320 | | 2011 | 391,460 | | 2010 | 372,489 | | 2009 | 354,005 | | 2008 | 336,362 | | 2007 | 319,523 | | 2006 | 303,584 | | 2005 | 288,731 | | 2004 | 274,899 | | 2003 | 262,065 | | 2002 | 250,542 | | 2001 | 240,537 | | 2000 | 232,132 | | 1999 | 225,208 | | 1998 | 219,446 | | 1997 | 215,062 | | 1996 | 212,118 | | 1995 | 209,881 | | 1994 | 207,941 | | 1993 | 206,542 | | 1992 | 205,687 | | 1991 | 205,124 | | 1990 | 204,548 | | 1989 | 203,462 | | 1988 | 202,592 | | 1987 | 202,396 | | 1986 | 201,482 | | 1985 | 199,090 | | 1984 | 196,714 | | 1983 | 194,775 | | 1982 | 192,651 | | 1981 | 191,103 | | 1980 | 189,906 | | 1979 | 187,302 | | 1978 | 182,849 | | 1977 | 177,580 | | 1976 | 172,545 | | 1975 | 168,287 | | 1974 | 165,341 | | 1973 | 163,833 | | 1972 | 163,165 | | 1971 | 163,047 | | 1970 | 163,114 | | 1969 | 163,323 | | 1968 | 163,750 | | 1967 | 164,260 | | 1966 | 164,867 | | 1965 | 165,513 | | 1964 | 166,061 | | 1963 | 166,422 | | 1962 | 166,611 | | 1961 | 166,757 | | 1960 | 166,942 |
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