Year | Value | 2022 | 22,827 | 2021 | 22,105 | 2020 | 21,512 | 2019 | 21,055 | 2018 | 20,747 | 2017 | 20,555 | 2016 | 20,405 | 2015 | 20,312 | 2014 | 20,255 | 2013 | 20,228 | 2012 | 20,220 | 2011 | 20,178 | 2010 | 20,080 | 2009 | 19,953 | 2008 | 19,752 | 2007 | 19,592 | 2006 | 19,540 | 2005 | 19,491 | 2004 | 19,441 | 2003 | 19,371 | 2002 | 19,276 | 2001 | 19,150 | 2000 | 19,017 | 1999 | 18,829 | 1998 | 18,433 | 1997 | 17,862 | 1996 | 17,186 | 1995 | 16,351 | 1994 | 15,825 | 1993 | 15,388 | 1992 | 14,525 | 1991 | 13,549 | 1990 | 12,632 | 1989 | 11,936 | 1988 | 11,260 | 1987 | 10,584 | 1986 | 10,090 | 1985 | 9,620 | 1984 | 9,263 | 1983 | 9,047 | 1982 | 8,858 | 1981 | 8,815 | 1980 | 8,810 | 1979 | 8,712 | 1978 | 8,615 | 1977 | 8,540 | 1976 | 8,439 | 1975 | 8,297 | 1974 | 8,164 | 1973 | 8,037 | 1972 | 7,913 | 1971 | 7,794 | 1970 | 7,680 | 1969 | 7,569 | 1968 | 7,459 | 1967 | 7,349 | 1966 | 7,234 | 1965 | 7,120 | 1964 | 7,008 | 1963 | 6,900 | 1962 | 6,792 | 1961 | 6,679 | 1960 | 6,562 |
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