| Year | Value | | 2022 | 77,957 | | 2021 | 75,602 | | 2020 | 72,944 | | 2019 | 69,824 | | 2018 | 66,838 | | 2017 | 64,016 | | 2016 | 61,203 | | 2015 | 58,495 | | 2014 | 55,887 | | 2013 | 53,305 | | 2012 | 50,837 | | 2011 | 48,483 | | 2010 | 46,213 | | 2009 | 44,018 | | 2008 | 41,909 | | 2007 | 39,940 | | 2006 | 38,105 | | 2005 | 36,388 | | 2004 | 34,759 | | 2003 | 33,197 | | 2002 | 31,716 | | 2001 | 30,348 | | 2000 | 29,083 | | 1999 | 27,899 | | 1998 | 26,769 | | 1997 | 25,672 | | 1996 | 24,595 | | 1995 | 23,544 | | 1994 | 22,501 | | 1993 | 21,466 | | 1992 | 20,443 | | 1991 | 19,425 | | 1990 | 18,419 | | 1989 | 17,439 | | 1988 | 16,504 | | 1987 | 15,617 | | 1986 | 14,769 | | 1985 | 13,944 | | 1984 | 13,136 | | 1983 | 12,370 | | 1982 | 11,665 | | 1981 | 11,029 | | 1980 | 10,478 | | 1979 | 10,010 | | 1978 | 9,693 | | 1977 | 9,537 | | 1976 | 9,844 | | 1975 | 11,634 | | 1974 | 12,811 | | 1973 | 12,291 | | 1972 | 11,737 | | 1971 | 11,192 | | 1970 | 10,670 | | 1969 | 10,166 | | 1968 | 9,693 | | 1967 | 9,244 | | 1966 | 8,822 | | 1965 | 8,445 | | 1964 | 8,114 | | 1963 | 7,833 | | 1962 | 7,608 | | 1961 | 7,413 | | 1960 | 7,233 |
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