| Year | Value | | 2022 | 58,995 | | 2021 | 56,584 | | 2020 | 53,887 | | 2019 | 51,174 | | 2018 | 48,565 | | 2017 | 46,320 | | 2016 | 44,516 | | 2015 | 42,093 | | 2014 | 40,016 | | 2013 | 39,132 | | 2012 | 38,625 | | 2011 | 37,952 | | 2010 | 36,614 | | 2009 | 35,113 | | 2008 | 33,407 | | 2007 | 31,557 | | 2006 | 28,651 | | 2005 | 25,891 | | 2004 | 24,461 | | 2003 | 23,196 | | 2002 | 22,074 | | 2001 | 21,089 | | 2000 | 20,242 | | 1999 | 19,517 | | 1998 | 18,891 | | 1997 | 18,283 | | 1996 | 17,603 | | 1995 | 16,808 | | 1994 | 15,906 | | 1993 | 14,922 | | 1992 | 13,933 | | 1991 | 13,029 | | 1990 | 12,235 | | 1989 | 11,497 | | 1988 | 10,824 | | 1987 | 10,261 | | 1986 | 9,789 | | 1985 | 9,399 | | 1984 | 9,087 | | 1983 | 8,846 | | 1982 | 8,636 | | 1981 | 8,416 | | 1980 | 8,189 | | 1979 | 7,961 | | 1978 | 7,727 | | 1977 | 7,497 | | 1976 | 7,297 | | 1975 | 7,127 | | 1974 | 6,975 | | 1973 | 6,845 | | 1972 | 6,744 | | 1971 | 6,667 | | 1970 | 6,600 | | 1969 | 6,523 | | 1968 | 6,419 | | 1967 | 6,277 | | 1966 | 6,093 | | 1965 | 5,886 | | 1964 | 5,676 | | 1963 | 5,464 | | 1962 | 5,247 | | 1961 | 5,037 | | 1960 | 4,842 |
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