| Year | Value | | 2022 | 473,519 | | 2021 | 450,460 | | 2020 | 427,522 | | 2019 | 404,914 | | 2018 | 382,913 | | 2017 | 362,056 | | 2016 | 342,392 | | 2015 | 324,131 | | 2014 | 307,854 | | 2013 | 293,525 | | 2012 | 280,932 | | 2011 | 269,989 | | 2010 | 260,653 | | 2009 | 253,012 | | 2008 | 247,037 | | 2007 | 242,576 | | 2006 | 239,819 | | 2005 | 239,306 | | 2004 | 239,303 | | 2003 | 237,718 | | 2002 | 235,073 | | 2001 | 237,698 | | 2000 | 241,853 | | 1999 | 240,509 | | 1998 | 236,692 | | 1997 | 235,310 | | 1996 | 232,276 | | 1995 | 223,744 | | 1994 | 215,308 | | 1993 | 206,475 | | 1992 | 197,512 | | 1991 | 188,573 | | 1990 | 178,477 | | 1989 | 170,111 | | 1988 | 163,819 | | 1987 | 157,889 | | 1986 | 152,682 | | 1985 | 148,402 | | 1984 | 142,465 | | 1983 | 136,185 | | 1982 | 132,436 | | 1981 | 130,066 | | 1980 | 128,737 | | 1979 | 130,745 | | 1978 | 134,347 | | 1977 | 136,102 | | 1976 | 136,902 | | 1975 | 136,733 | | 1974 | 135,977 | | 1973 | 135,101 | | 1972 | 134,141 | | 1971 | 132,949 | | 1970 | 131,609 | | 1969 | 130,087 | | 1968 | 128,207 | | 1967 | 126,218 | | 1966 | 124,361 | | 1965 | 122,710 | | 1964 | 121,213 | | 1963 | 119,830 | | 1962 | 118,546 | | 1961 | 117,293 | | 1960 | 116,029 |
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