| Year | Value | | 2022 | 13,101 | | 2021 | 12,826 | | 2020 | 12,600 | | 2019 | 12,126 | | 2018 | 11,248 | | 2017 | 10,516 | | 2016 | 10,194 | | 2015 | 10,335 | | 2014 | 10,410 | | 2013 | 10,083 | | 2012 | 9,737 | | 2011 | 9,501 | | 2010 | 9,389 | | 2009 | 8,776 | | 2008 | 7,910 | | 2007 | 7,409 | | 2006 | 7,064 | | 2005 | 6,729 | | 2004 | 6,309 | | 2003 | 5,815 | | 2002 | 5,455 | | 2001 | 5,176 | | 2000 | 4,947 | | 1999 | 4,825 | | 1998 | 4,617 | | 1997 | 4,489 | | 1996 | 5,016 | | 1995 | 5,948 | | 1994 | 5,018 | | 1993 | 4,692 | | 1992 | 5,624 | | 1991 | 5,581 | | 1990 | 5,698 | | 1989 | 5,820 | | 1988 | 5,932 | | 1987 | 5,941 | | 1986 | 5,884 | | 1985 | 5,877 | | 1984 | 5,816 | | 1983 | 5,734 | | 1982 | 5,627 | | 1981 | 5,631 | | 1980 | 5,260 | | 1979 | 4,769 | | 1978 | 4,620 | | 1977 | 4,382 | | 1976 | 4,186 | | 1975 | 4,060 | | 1974 | 3,906 | | 1973 | 3,730 | | 1972 | 3,912 | | 1971 | 4,128 | | 1970 | 4,060 | | 1969 | 4,033 | | 1968 | 4,005 | | 1967 | 3,947 | | 1966 | 3,866 | | 1965 | 3,818 | | 1964 | 3,703 | | 1963 | 3,539 | | 1962 | 3,482 | | 1961 | 3,368 | | 1960 | 3,237 |
|