Year | Value | 2022 | 59,720 | 2021 | 59,922 | 2020 | 59,615 | 2019 | 58,314 | 2018 | 56,226 | 2017 | 54,239 | 2016 | 52,072 | 2015 | 50,013 | 2014 | 48,647 | 2013 | 48,024 | 2012 | 48,035 | 2011 | 48,500 | 2010 | 48,888 | 2009 | 49,055 | 2008 | 49,042 | 2007 | 48,690 | 2006 | 48,224 | 2005 | 47,702 | 2004 | 47,209 | 2003 | 47,271 | 2002 | 47,720 | 2001 | 48,072 | 2000 | 48,143 | 1999 | 47,814 | 1998 | 44,959 | 1997 | 39,656 | 1996 | 34,036 | 1995 | 29,707 | 1994 | 27,812 | 1993 | 29,816 | 1992 | 34,907 | 1991 | 40,224 | 1990 | 44,521 | 1989 | 46,070 | 1988 | 46,012 | 1987 | 45,716 | 1986 | 45,208 | 1985 | 44,630 | 1984 | 43,507 | 1983 | 42,045 | 1982 | 40,870 | 1981 | 40,167 | 1980 | 40,101 | 1979 | 39,923 | 1978 | 39,229 | 1977 | 38,218 | 1976 | 36,880 | 1975 | 35,196 | 1974 | 33,435 | 1973 | 31,972 | 1972 | 30,331 | 1971 | 28,576 | 1970 | 26,905 | 1969 | 25,496 | 1968 | 24,514 | 1967 | 23,824 | 1966 | 23,306 | 1965 | 23,030 | 1964 | 22,786 | 1963 | 22,204 | 1962 | 21,899 | 1961 | 21,813 | 1960 | 21,197 |
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