| Year | Value | | 2022 | 112,038 | | 2021 | 103,813 | | 2020 | 100,645 | | 2019 | 100,174 | | 2018 | 100,000 | | 2017 | 101,755 | | 2016 | 103,853 | | 2015 | 104,079 | | 2014 | 103,066 | | 2013 | 102,658 | | 2012 | 102,254 | | 2011 | 100,586 | | 2010 | 99,420 | | 2009 | 97,392 | | 2008 | 93,989 | | 2007 | 89,580 | | 2006 | 84,983 | | 2005 | 80,162 | | 2004 | 76,039 | | 2003 | 72,566 | | 2002 | 69,675 | | 2001 | 66,224 | | 2000 | 62,803 | | 1999 | 59,207 | | 1998 | 55,310 | | 1997 | 50,781 | | 1996 | 46,061 | | 1995 | 42,026 | | 1994 | 41,307 | | 1993 | 41,084 | | 1992 | 41,166 | | 1991 | 41,039 | | 1990 | 39,769 | | 1989 | 37,808 | | 1988 | 35,042 | | 1987 | 31,749 | | 1986 | 28,013 | | 1985 | 24,981 | | 1984 | 23,283 | | 1983 | 21,997 | | 1982 | 20,798 | | 1981 | 19,615 | | 1980 | 18,166 | | 1979 | 16,686 | | 1978 | 15,036 | | 1977 | 14,140 | | 1976 | 13,206 | | 1975 | 12,132 | | 1974 | 10,905 | | 1973 | 9,622 | | 1972 | 8,517 | | 1971 | 7,719 | | 1970 | 7,119 | | 1969 | 6,678 | | 1968 | 6,374 | | 1967 | 5,983 | | 1966 | 5,518 | | 1965 | 5,097 | | 1964 | 4,594 | | 1963 | 4,180 | | 1962 | 3,829 | | 1961 | 3,526 | | 1960 | 3,290 |
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