| Year | Value | | 2022 | 189,552 | | 2021 | 193,028 | | 2020 | 194,847 | | 2019 | 190,950 | | 2018 | 185,336 | | 2017 | 177,161 | | 2016 | 166,711 | | 2015 | 155,180 | | 2014 | 144,376 | | 2013 | 136,761 | | 2012 | 134,269 | | 2011 | 134,240 | | 2010 | 134,213 | | 2009 | 133,023 | | 2008 | 131,128 | | 2007 | 129,064 | | 2006 | 126,983 | | 2005 | 125,042 | | 2004 | 124,050 | | 2003 | 123,552 | | 2002 | 123,491 | | 2001 | 125,279 | | 2000 | 129,816 | | 1999 | 134,287 | | 1998 | 137,961 | | 1997 | 139,635 | | 1996 | 138,891 | | 1995 | 136,988 | | 1994 | 135,780 | | 1993 | 135,779 | | 1992 | 137,082 | | 1991 | 138,329 | | 1990 | 134,409 | | 1989 | 136,325 | | 1988 | 137,239 | | 1987 | 136,122 | | 1986 | 133,323 | | 1985 | 131,765 | | 1984 | 129,118 | | 1983 | 125,738 | | 1982 | 121,890 | | 1981 | 118,977 | | 1980 | 117,258 | | 1979 | 117,254 | | 1978 | 119,555 | | 1977 | 121,974 | | 1976 | 123,193 | | 1975 | 121,322 | | 1974 | 115,590 | | 1973 | 108,475 | | 1972 | 101,486 | | 1971 | 95,727 | | 1970 | 92,165 | | 1969 | 90,283 | | 1968 | 89,446 | | 1967 | 88,314 | | 1966 | 85,111 | | 1965 | 81,215 | | 1964 | 78,208 | | 1963 | 76,023 | | 1962 | 74,907 | | 1961 | 74,294 | | 1960 | 74,958 |
|