| Year | Value | | 2022 | 151,137 | | 2021 | 169,626 | | 2020 | 181,584 | | 2019 | 195,092 | | 2018 | 207,743 | | 2017 | 218,761 | | 2016 | 228,153 | | 2015 | 234,219 | | 2014 | 236,655 | | 2013 | 237,903 | | 2012 | 239,018 | | 2011 | 239,868 | | 2010 | 241,659 | | 2009 | 246,424 | | 2008 | 252,642 | | 2007 | 259,798 | | 2006 | 268,293 | | 2005 | 276,441 | | 2004 | 283,323 | | 2003 | 287,553 | | 2002 | 286,652 | | 2001 | 287,192 | | 2000 | 288,494 | | 1999 | 286,316 | | 1998 | 285,891 | | 1997 | 285,479 | | 1996 | 282,456 | | 1995 | 278,560 | | 1994 | 275,012 | | 1993 | 271,785 | | 1992 | 273,544 | | 1991 | 280,553 | | 1990 | 288,026 | | 1989 | 295,828 | | 1988 | 300,594 | | 1987 | 302,701 | | 1986 | 305,182 | | 1985 | 307,893 | | 1984 | 310,920 | | 1983 | 314,160 | | 1982 | 316,994 | | 1981 | 318,101 | | 1980 | 319,157 | | 1979 | 323,408 | | 1978 | 330,630 | | 1977 | 337,630 | | 1976 | 343,700 | | 1975 | 347,810 | | 1974 | 344,663 | | 1973 | 334,607 | | 1972 | 322,632 | | 1971 | 310,001 | | 1970 | 298,257 | | 1969 | 289,860 | | 1968 | 285,350 | | 1967 | 284,397 | | 1966 | 286,745 | | 1965 | 292,623 | | 1964 | 301,917 | | 1963 | 312,791 | | 1962 | 322,585 | | 1961 | 329,430 | | 1960 | 332,621 |
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