Year | Value | 2022 | 11,321 | 2021 | 11,161 | 2020 | 11,318 | 2019 | 11,307 | 2018 | 11,028 | 2017 | 10,771 | 2016 | 10,589 | 2015 | 10,366 | 2014 | 10,136 | 2013 | 10,001 | 2012 | 9,848 | 2011 | 9,640 | 2010 | 9,513 | 2009 | 9,424 | 2008 | 9,330 | 2007 | 9,301 | 2006 | 9,319 | 2005 | 9,426 | 2004 | 9,658 | 2003 | 9,934 | 2002 | 10,293 | 2001 | 10,743 | 2000 | 11,039 | 1999 | 11,202 | 1998 | 11,416 | 1997 | 11,665 | 1996 | 11,887 | 1995 | 12,225 | 1994 | 12,697 | 1993 | 13,077 | 1992 | 13,254 | 1991 | 13,284 | 1990 | 13,052 | 1989 | 12,991 | 1988 | 12,950 | 1987 | 13,067 | 1986 | 13,216 | 1985 | 13,170 | 1984 | 13,144 | 1983 | 13,292 | 1982 | 13,164 | 1981 | 13,040 | 1980 | 13,182 | 1979 | 13,137 | 1978 | 12,991 | 1977 | 12,753 | 1976 | 12,508 | 1975 | 12,190 | 1974 | 11,793 | 1973 | 11,504 | 1972 | 11,305 | 1971 | 11,164 | 1970 | 11,063 | 1969 | 11,289 | 1968 | 11,839 | 1967 | 12,607 | 1966 | 13,614 | 1965 | 14,898 | 1964 | 16,219 | 1963 | 17,353 | 1962 | 18,367 | 1961 | 19,194 | 1960 | 19,710 |
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