| Year | Value | | 2022 | 159,520 | | 2021 | 172,095 | | 2020 | 173,247 | | 2019 | 169,251 | | 2018 | 162,810 | | 2017 | 156,216 | | 2016 | 149,705 | | 2015 | 144,103 | | 2014 | 140,626 | | 2013 | 138,845 | | 2012 | 138,569 | | 2011 | 139,893 | | 2010 | 143,106 | | 2009 | 148,033 | | 2008 | 153,449 | | 2007 | 158,201 | | 2006 | 161,232 | | 2005 | 162,116 | | 2004 | 161,282 | | 2003 | 159,550 | | 2002 | 157,826 | | 2001 | 159,067 | | 2000 | 161,430 | | 1999 | 162,110 | | 1998 | 162,584 | | 1997 | 162,719 | | 1996 | 162,507 | | 1995 | 160,761 | | 1994 | 156,023 | | 1993 | 148,852 | | 1992 | 141,044 | | 1991 | 133,067 | | 1990 | 126,389 | | 1989 | 125,974 | | 1988 | 131,076 | | 1987 | 137,103 | | 1986 | 143,406 | | 1985 | 150,049 | | 1984 | 154,002 | | 1983 | 154,095 | | 1982 | 153,570 | | 1981 | 152,033 | | 1980 | 148,335 | | 1979 | 143,701 | | 1978 | 139,560 | | 1977 | 135,688 | | 1976 | 131,224 | | 1975 | 126,652 | | 1974 | 122,177 | | 1973 | 117,730 | | 1972 | 113,647 | | 1971 | 109,906 | | 1970 | 105,938 | | 1969 | 101,463 | | 1968 | 96,480 | | 1967 | 91,289 | | 1966 | 85,881 | | 1965 | 80,251 | | 1964 | 75,372 | | 1963 | 71,749 | | 1962 | 69,813 | | 1961 | 69,632 | | 1960 | 70,527 |
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