Year | Value | 2022 | 21,578 | 2021 | 21,725 | 2020 | 21,790 | 2019 | 21,610 | 2018 | 21,195 | 2017 | 20,751 | 2016 | 20,373 | 2015 | 20,144 | 2014 | 19,951 | 2013 | 19,588 | 2012 | 19,245 | 2011 | 18,960 | 2010 | 18,719 | 2009 | 18,564 | 2008 | 18,374 | 2007 | 18,223 | 2006 | 18,128 | 2005 | 18,002 | 2004 | 17,683 | 2003 | 17,128 | 2002 | 16,680 | 2001 | 16,396 | 2000 | 16,166 | 1999 | 15,934 | 1998 | 15,712 | 1997 | 15,519 | 1996 | 15,334 | 1995 | 14,861 | 1994 | 14,347 | 1993 | 14,387 | 1992 | 14,453 | 1991 | 14,009 | 1990 | 13,608 | 1989 | 13,374 | 1988 | 12,990 | 1987 | 12,535 | 1986 | 11,996 | 1985 | 11,539 | 1984 | 11,494 | 1983 | 11,486 | 1982 | 10,793 | 1981 | 10,045 | 1980 | 9,987 | 1979 | 9,935 | 1978 | 9,598 | 1977 | 9,281 | 1976 | 8,993 | 1975 | 8,780 | 1974 | 8,631 | 1973 | 8,526 | 1972 | 8,461 | 1971 | 8,415 | 1970 | 8,351 | 1969 | 8,250 | 1968 | 8,125 | 1967 | 7,973 | 1966 | 7,817 | 1965 | 7,685 | 1964 | 7,553 | 1963 | 7,399 | 1962 | 7,250 | 1961 | 7,101 | 1960 | 6,945 |
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