| Year | Value | | 2022 | 9,410 | | 2021 | 9,111 | | 2020 | 8,834 | | 2019 | 8,623 | | 2018 | 8,368 | | 2017 | 8,084 | | 2016 | 7,879 | | 2015 | 7,621 | | 2014 | 7,304 | | 2013 | 6,952 | | 2012 | 6,586 | | 2011 | 6,260 | | 2010 | 6,021 | | 2009 | 5,875 | | 2008 | 5,798 | | 2007 | 5,751 | | 2006 | 5,708 | | 2005 | 5,647 | | 2004 | 5,557 | | 2003 | 5,447 | | 2002 | 5,339 | | 2001 | 5,251 | | 2000 | 5,191 | | 1999 | 5,167 | | 1998 | 5,183 | | 1997 | 5,237 | | 1996 | 5,318 | | 1995 | 5,409 | | 1994 | 5,498 | | 1993 | 5,568 | | 1992 | 5,620 | | 1991 | 5,655 | | 1990 | 5,698 | | 1989 | 5,715 | | 1988 | 5,669 | | 1987 | 5,579 | | 1986 | 5,485 | | 1985 | 5,426 | | 1984 | 5,428 | | 1983 | 5,499 | | 1982 | 5,615 | | 1981 | 5,734 | | 1980 | 5,806 | | 1979 | 5,794 | | 1978 | 5,698 | | 1977 | 5,553 | | 1976 | 5,397 | | 1975 | 5,269 | | 1974 | 5,197 | | 1973 | 5,180 | | 1972 | 5,192 | | 1971 | 5,206 | | 1970 | 5,179 | | 1969 | 5,091 | | 1968 | 4,958 | | 1967 | 4,788 | | 1966 | 4,600 | | 1965 | 4,410 | | 1964 | 4,224 | | 1963 | 4,052 | | 1962 | 3,891 | | 1961 | 3,743 | | 1960 | 3,596 |
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