Year | Value | 2022 | 15,862 | 2021 | 15,897 | 2020 | 15,914 | 2019 | 15,882 | 2018 | 15,858 | 2017 | 15,830 | 2016 | 15,774 | 2015 | 15,686 | 2014 | 15,582 | 2013 | 15,516 | 2012 | 15,489 | 2011 | 15,336 | 2010 | 15,207 | 2009 | 15,015 | 2008 | 14,585 | 2007 | 14,150 | 2006 | 13,738 | 2005 | 13,344 | 2004 | 12,968 | 2003 | 12,614 | 2002 | 12,277 | 2001 | 11,971 | 2000 | 11,706 | 1999 | 11,458 | 1998 | 11,213 | 1997 | 10,977 | 1996 | 10,748 | 1995 | 10,531 | 1994 | 10,328 | 1993 | 10,135 | 1992 | 9,951 | 1991 | 9,761 | 1990 | 9,712 | 1989 | 9,640 | 1988 | 9,563 | 1987 | 9,480 | 1986 | 9,386 | 1985 | 9,277 | 1984 | 9,152 | 1983 | 9,016 | 1982 | 8,871 | 1981 | 8,714 | 1980 | 8,583 | 1979 | 8,484 | 1978 | 8,438 | 1977 | 8,388 | 1976 | 8,334 | 1975 | 8,280 | 1974 | 8,231 | 1973 | 8,185 | 1972 | 8,151 | 1971 | 8,128 | 1970 | 7,987 | 1969 | 7,646 | 1968 | 7,295 | 1967 | 7,071 | 1966 | 6,940 | 1965 | 6,872 | 1964 | 6,848 | 1963 | 6,855 | 1962 | 6,873 | 1961 | 6,890 | 1960 | 6,890 |
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