Year | Value | 2022 | 19,035 | 2021 | 18,872 | 2020 | 18,727 | 2019 | 18,512 | 2018 | 18,042 | 2017 | 17,444 | 2016 | 16,819 | 2015 | 15,689 | 2014 | 14,254 | 2013 | 13,303 | 2012 | 12,766 | 2011 | 12,573 | 2010 | 13,123 | 2009 | 14,096 | 2008 | 14,886 | 2007 | 15,479 | 2006 | 15,842 | 2005 | 15,848 | 2004 | 15,518 | 2003 | 15,067 | 2002 | 14,603 | 2001 | 14,234 | 2000 | 14,000 | 1999 | 13,954 | 1998 | 13,907 | 1997 | 13,699 | 1996 | 13,149 | 1995 | 12,194 | 1994 | 10,972 | 1993 | 9,700 | 1992 | 8,601 | 1991 | 7,895 | 1990 | 7,572 | 1989 | 7,479 | 1988 | 7,489 | 1987 | 7,556 | 1986 | 7,706 | 1985 | 8,019 | 1984 | 8,501 | 1983 | 9,063 | 1982 | 9,595 | 1981 | 9,968 | 1980 | 10,098 | 1979 | 10,001 | 1978 | 9,743 | 1977 | 9,377 | 1976 | 8,935 | 1975 | 8,431 | 1974 | 7,885 | 1973 | 7,352 | 1972 | 6,905 | 1971 | 6,626 | 1970 | 6,582 | 1969 | 6,766 | 1968 | 7,098 | 1967 | 7,476 | 1966 | 7,780 | 1965 | 7,904 | 1964 | 7,810 | 1963 | 7,550 | 1962 | 7,217 | 1961 | 6,906 | 1960 | 6,682 |
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