Year | Value | 2022 | 24,766 | 2021 | 24,120 | 2020 | 23,546 | 2019 | 23,062 | 2018 | 22,546 | 2017 | 22,016 | 2016 | 21,616 | 2015 | 21,435 | 2014 | 21,250 | 2013 | 21,218 | 2012 | 21,195 | 2011 | 21,082 | 2010 | 20,865 | 2009 | 20,674 | 2008 | 20,472 | 2007 | 20,124 | 2006 | 19,721 | 2005 | 19,327 | 2004 | 18,861 | 2003 | 18,320 | 2002 | 17,894 | 2001 | 17,556 | 2000 | 17,097 | 1999 | 16,628 | 1998 | 16,310 | 1997 | 16,018 | 1996 | 15,552 | 1995 | 15,032 | 1994 | 14,630 | 1993 | 14,236 | 1992 | 13,893 | 1991 | 13,649 | 1990 | 13,297 | 1989 | 12,794 | 1988 | 12,425 | 1987 | 12,129 | 1986 | 11,770 | 1985 | 11,591 | 1984 | 11,677 | 1983 | 11,792 | 1982 | 11,799 | 1981 | 11,757 | 1980 | 11,746 | 1979 | 11,666 | 1978 | 11,543 | 1977 | 11,579 | 1976 | 11,788 | 1975 | 12,040 | 1974 | 12,255 | 1973 | 12,419 | 1972 | 12,541 | 1971 | 12,546 | 1970 | 12,360 | 1969 | 12,141 | 1968 | 12,052 | 1967 | 11,957 | 1966 | 11,820 | 1965 | 11,807 | 1964 | 11,601 | 1963 | 10,935 | 1962 | 10,208 | 1961 | 9,623 | 1960 | 9,162 |
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