Year | Value | 2022 | 53,944 | 2021 | 53,530 | 2020 | 52,727 | 2019 | 51,502 | 2018 | 50,025 | 2017 | 48,403 | 2016 | 46,580 | 2015 | 44,618 | 2014 | 42,595 | 2013 | 40,655 | 2012 | 39,187 | 2011 | 38,483 | 2010 | 38,284 | 2009 | 38,125 | 2008 | 37,757 | 2007 | 37,337 | 2006 | 37,161 | 2005 | 37,213 | 2004 | 37,370 | 2003 | 37,624 | 2002 | 37,759 | 2001 | 37,900 | 2000 | 37,209 | 1999 | 36,247 | 1998 | 35,189 | 1997 | 34,226 | 1996 | 33,608 | 1995 | 32,932 | 1994 | 32,214 | 1993 | 31,380 | 1992 | 30,386 | 1991 | 29,233 | 1990 | 27,997 | 1989 | 26,739 | 1988 | 25,403 | 1987 | 23,983 | 1986 | 22,566 | 1985 | 21,340 | 1984 | 20,518 | 1983 | 20,317 | 1982 | 20,860 | 1981 | 22,022 | 1980 | 23,493 | 1979 | 24,855 | 1978 | 25,676 | 1977 | 25,656 | 1976 | 24,761 | 1975 | 23,185 | 1974 | 21,166 | 1973 | 18,968 | 1972 | 16,889 | 1971 | 15,113 | 1970 | 13,692 | 1969 | 12,665 | 1968 | 12,044 | 1967 | 11,758 | 1966 | 11,821 | 1965 | 12,076 | 1964 | 12,267 | 1963 | 12,354 | 1962 | 12,312 | 1961 | 12,028 | 1960 | 11,690 |
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