Year | Value | 2022 | 16,381 | 2021 | 16,421 | 2020 | 16,482 | 2019 | 16,538 | 2018 | 16,575 | 2017 | 16,615 | 2016 | 16,648 | 2015 | 16,673 | 2014 | 16,707 | 2013 | 16,766 | 2012 | 16,810 | 2011 | 16,753 | 2010 | 16,576 | 2009 | 16,357 | 2008 | 16,057 | 2007 | 15,600 | 2006 | 15,175 | 2005 | 14,931 | 2004 | 14,728 | 2003 | 14,535 | 2002 | 14,472 | 2001 | 14,466 | 2000 | 14,357 | 1999 | 14,154 | 1998 | 13,929 | 1997 | 13,752 | 1996 | 13,627 | 1995 | 13,503 | 1994 | 13,501 | 1993 | 13,687 | 1992 | 13,869 | 1991 | 13,992 | 1990 | 14,135 | 1989 | 14,107 | 1988 | 13,897 | 1987 | 13,773 | 1986 | 13,798 | 1985 | 13,952 | 1984 | 14,180 | 1983 | 14,328 | 1982 | 14,332 | 1981 | 14,208 | 1980 | 13,911 | 1979 | 13,423 | 1978 | 12,799 | 1977 | 12,116 | 1976 | 11,456 | 1975 | 10,861 | 1974 | 10,329 | 1973 | 9,826 | 1972 | 9,302 | 1971 | 8,707 | 1970 | 8,057 | 1969 | 7,556 | 1968 | 7,257 | 1967 | 7,018 | 1966 | 6,784 | 1965 | 6,499 | 1964 | 6,214 | 1963 | 5,993 | 1962 | 5,816 | 1961 | 5,667 | 1960 | 5,515 |
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