| Year | Value | | 2022 | 56,564 | | 2021 | 53,785 | | 2020 | 50,636 | | 2019 | 48,727 | | 2018 | 47,253 | | 2017 | 45,482 | | 2016 | 44,050 | | 2015 | 43,160 | | 2014 | 41,993 | | 2013 | 40,174 | | 2012 | 39,201 | | 2011 | 39,251 | | 2010 | 38,675 | | 2009 | 36,288 | | 2008 | 32,761 | | 2007 | 29,278 | | 2006 | 25,934 | | 2005 | 22,786 | | 2004 | 19,878 | | 2003 | 17,483 | | 2002 | 15,783 | | 2001 | 14,469 | | 2000 | 13,291 | | 1999 | 12,248 | | 1998 | 11,347 | | 1997 | 10,600 | | 1996 | 10,005 | | 1995 | 9,525 | | 1994 | 9,115 | | 1993 | 8,754 | | 1992 | 8,423 | | 1991 | 8,097 | | 1990 | 7,854 | | 1989 | 7,703 | | 1988 | 7,563 | | 1987 | 7,429 | | 1986 | 7,291 | | 1985 | 7,147 | | 1984 | 6,993 | | 1983 | 6,818 | | 1982 | 6,618 | | 1981 | 6,369 | | 1980 | 6,041 | | 1979 | 5,688 | | 1978 | 5,382 | | 1977 | 5,123 | | 1976 | 4,901 | | 1975 | 4,715 | | 1974 | 4,555 | | 1973 | 4,406 | | 1972 | 4,265 | | 1971 | 4,113 | | 1970 | 3,903 | | 1969 | 3,656 | | 1968 | 3,415 | | 1967 | 3,187 | | 1966 | 2,976 | | 1965 | 2,781 | | 1964 | 2,619 | | 1963 | 2,493 | | 1962 | 2,379 | | 1961 | 2,278 | | 1960 | 2,188 |
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