| Year | Value | | 2022 | 512,724 | | 2021 | 497,715 | | 2020 | 482,921 | | 2019 | 470,528 | | 2018 | 462,081 | | 2017 | 456,585 | | 2016 | 453,530 | | 2015 | 451,994 | | 2014 | 450,784 | | 2013 | 447,179 | | 2012 | 440,147 | | 2011 | 431,206 | | 2010 | 420,956 | | 2009 | 410,271 | | 2008 | 400,307 | | 2007 | 390,980 | | 2006 | 382,203 | | 2005 | 373,991 | | 2004 | 366,089 | | 2003 | 358,219 | | 2002 | 350,285 | | 2001 | 343,261 | | 2000 | 336,285 | | 1999 | 328,489 | | 1998 | 320,855 | | 1997 | 313,583 | | 1996 | 306,489 | | 1995 | 299,745 | | 1994 | 293,160 | | 1993 | 286,556 | | 1992 | 280,090 | | 1991 | 273,292 | | 1990 | 266,064 | | 1989 | 258,644 | | 1988 | 252,053 | | 1987 | 246,759 | | 1986 | 241,945 | | 1985 | 237,152 | | 1984 | 232,263 | | 1983 | 227,255 | | 1982 | 222,055 | | 1981 | 216,742 | | 1980 | 211,472 | | 1979 | 206,789 | | 1978 | 203,123 | | 1977 | 200,432 | | 1976 | 198,588 | | 1975 | 196,389 | | 1974 | 193,402 | | 1973 | 190,244 | | 1972 | 186,642 | | 1971 | 182,406 | | 1970 | 177,667 | | 1969 | 172,537 | | 1968 | 167,171 | | 1967 | 161,971 | | 1966 | 157,164 | | 1965 | 152,753 | | 1964 | 148,759 | | 1963 | 145,154 | | 1962 | 141,898 | | 1961 | 138,915 | | 1960 | 136,177 |
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