| Year | Value | | 2022 | 420,357 | | 2021 | 412,703 | | 2020 | 404,903 | | 2019 | 397,126 | | 2018 | 389,497 | | 2017 | 381,884 | | 2016 | 373,999 | | 2015 | 365,933 | | 2014 | 358,036 | | 2013 | 350,298 | | 2012 | 342,717 | | 2011 | 335,285 | | 2010 | 328,043 | | 2009 | 321,030 | | 2008 | 314,245 | | 2007 | 307,665 | | 2006 | 301,235 | | 2005 | 294,921 | | 2004 | 288,795 | | 2003 | 283,149 | | 2002 | 277,671 | | 2001 | 272,077 | | 2000 | 266,733 | | 1999 | 261,808 | | 1998 | 256,769 | | 1997 | 251,442 | | 1996 | 246,190 | | 1995 | 241,029 | | 1994 | 235,983 | | 1993 | 230,988 | | 1992 | 225,897 | | 1991 | 220,681 | | 1990 | 215,287 | | 1989 | 209,652 | | 1988 | 204,008 | | 1987 | 198,536 | | 1986 | 193,270 | | 1985 | 188,231 | | 1984 | 183,435 | | 1983 | 178,892 | | 1982 | 174,590 | | 1981 | 170,274 | | 1980 | 165,532 | | 1979 | 160,357 | | 1978 | 155,120 | | 1977 | 150,078 | | 1976 | 145,277 | | 1975 | 140,773 | | 1974 | 136,512 | | 1973 | 132,440 | | 1972 | 128,615 | | 1971 | 125,019 | | 1970 | 121,627 | | 1969 | 118,418 | | 1968 | 115,363 | | 1967 | 112,504 | | 1966 | 109,976 | | 1965 | 107,672 | | 1964 | 105,443 | | 1963 | 103,295 | | 1962 | 101,196 | | 1961 | 99,149 | | 1960 | 97,171 |
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