| Year | Value | | 2022 | 489,579 | | 2021 | 471,516 | | 2020 | 453,556 | | 2019 | 436,627 | | 2018 | 420,624 | | 2017 | 405,038 | | 2016 | 390,152 | | 2015 | 375,951 | | 2014 | 362,333 | | 2013 | 349,808 | | 2012 | 338,761 | | 2011 | 329,069 | | 2010 | 320,315 | | 2009 | 312,351 | | 2008 | 304,826 | | 2007 | 297,372 | | 2006 | 290,007 | | 2005 | 283,017 | | 2004 | 276,402 | | 2003 | 270,024 | | 2002 | 263,946 | | 2001 | 257,774 | | 2000 | 251,285 | | 1999 | 244,558 | | 1998 | 237,704 | | 1997 | 230,486 | | 1996 | 222,953 | | 1995 | 215,143 | | 1994 | 207,428 | | 1993 | 200,282 | | 1992 | 193,198 | | 1991 | 185,776 | | 1990 | 178,357 | | 1989 | 170,861 | | 1988 | 162,869 | | 1987 | 155,107 | | 1986 | 148,234 | | 1985 | 141,960 | | 1984 | 136,141 | | 1983 | 130,726 | | 1982 | 125,786 | | 1981 | 121,974 | | 1980 | 119,780 | | 1979 | 119,108 | | 1978 | 120,102 | | 1977 | 122,503 | | 1976 | 125,326 | | 1975 | 127,637 | | 1974 | 129,309 | | 1973 | 130,335 | | 1972 | 130,123 | | 1971 | 128,525 | | 1970 | 125,928 | | 1969 | 122,315 | | 1968 | 117,663 | | 1967 | 112,414 | | 1966 | 107,083 | | 1965 | 101,841 | | 1964 | 96,652 | | 1963 | 91,600 | | 1962 | 87,004 | | 1961 | 83,126 | | 1960 | 80,049 |
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