Year | Value | 2022 | 19,519 | 2021 | 18,574 | 2020 | 17,878 | 2019 | 17,412 | 2018 | 17,101 | 2017 | 16,848 | 2016 | 16,604 | 2015 | 16,286 | 2014 | 15,838 | 2013 | 15,330 | 2012 | 14,834 | 2011 | 14,383 | 2010 | 13,990 | 2009 | 13,651 | 2008 | 13,345 | 2007 | 13,066 | 2006 | 12,803 | 2005 | 12,522 | 2004 | 12,197 | 2003 | 11,837 | 2002 | 11,461 | 2001 | 11,092 | 2000 | 10,737 | 1999 | 10,499 | 1998 | 10,350 | 1997 | 10,284 | 1996 | 10,328 | 1995 | 10,385 | 1994 | 10,437 | 1993 | 10,524 | 1992 | 11,051 | 1991 | 11,411 | 1990 | 11,138 | 1989 | 10,787 | 1988 | 10,449 | 1987 | 10,136 | 1986 | 9,836 | 1985 | 9,542 | 1984 | 9,250 | 1983 | 8,958 | 1982 | 8,665 | 1981 | 8,375 | 1980 | 8,093 | 1979 | 7,817 | 1978 | 7,542 | 1977 | 7,273 | 1976 | 7,011 | 1975 | 6,756 | 1974 | 6,510 | 1973 | 6,272 | 1972 | 6,041 | 1971 | 5,823 | 1970 | 5,615 | 1969 | 5,418 | 1968 | 5,229 | 1967 | 5,052 | 1966 | 4,885 | 1965 | 4,726 | 1964 | 4,575 | 1963 | 4,435 | 1962 | 4,301 | 1961 | 4,174 | 1960 | 4,059 |
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