Year | Value | 2022 | 23,646 | 2021 | 22,962 | 2020 | 22,724 | 2019 | 22,675 | 2018 | 22,806 | 2017 | 23,018 | 2016 | 23,233 | 2015 | 23,421 | 2014 | 23,674 | 2013 | 24,139 | 2012 | 24,893 | 2011 | 25,262 | 2010 | 25,041 | 2009 | 24,646 | 2008 | 23,955 | 2007 | 22,933 | 2006 | 21,654 | 2005 | 20,303 | 2004 | 19,127 | 2003 | 18,367 | 2002 | 17,673 | 2001 | 16,451 | 2000 | 14,702 | 1999 | 12,592 | 1998 | 10,252 | 1997 | 8,632 | 1996 | 7,267 | 1995 | 5,951 | 1994 | 8,091 | 1993 | 10,548 | 1992 | 10,570 | 1991 | 10,740 | 1990 | 10,914 | 1989 | 11,101 | 1988 | 11,297 | 1987 | 11,384 | 1986 | 11,343 | 1985 | 11,252 | 1984 | 11,125 | 1983 | 10,920 | 1982 | 10,667 | 1981 | 10,438 | 1980 | 10,271 | 1979 | 10,170 | 1978 | 10,136 | 1977 | 10,152 | 1976 | 10,139 | 1975 | 10,060 | 1974 | 9,920 | 1973 | 9,702 | 1972 | 9,428 | 1971 | 9,175 | 1970 | 8,991 | 1969 | 8,871 | 1968 | 8,831 | 1967 | 8,849 | 1966 | 8,846 | 1965 | 8,783 | 1964 | 8,673 | 1963 | 8,533 | 1962 | 8,317 | 1961 | 8,002 | 1960 | 7,609 |
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