| Year | Value | | 2022 | 9,468 | | 2021 | 9,187 | | 2020 | 8,989 | | 2019 | 8,859 | | 2018 | 8,769 | | 2017 | 8,687 | | 2016 | 8,576 | | 2015 | 8,396 | | 2014 | 8,116 | | 2013 | 7,780 | | 2012 | 7,455 | | 2011 | 7,151 | | 2010 | 6,866 | | 2009 | 6,601 | | 2008 | 6,358 | | 2007 | 6,137 | | 2006 | 5,925 | | 2005 | 5,732 | | 2004 | 5,563 | | 2003 | 5,402 | | 2002 | 5,226 | | 2001 | 5,034 | | 2000 | 4,850 | | 1999 | 4,671 | | 1998 | 4,490 | | 1997 | 4,303 | | 1996 | 4,136 | | 1995 | 4,006 | | 1994 | 3,935 | | 1993 | 3,828 | | 1992 | 3,874 | | 1991 | 3,884 | | 1990 | 3,548 | | 1989 | 3,186 | | 1988 | 2,932 | | 1987 | 2,733 | | 1986 | 2,544 | | 1985 | 2,383 | | 1984 | 2,255 | | 1983 | 2,156 | | 1982 | 2,071 | | 1981 | 1,981 | | 1980 | 1,871 | | 1979 | 1,741 | | 1978 | 1,595 | | 1977 | 1,442 | | 1976 | 1,301 | | 1975 | 1,177 | | 1974 | 1,072 | | 1973 | 988 | | 1972 | 914 | | 1971 | 848 | | 1970 | 787 | | 1969 | 732 | | 1968 | 684 | | 1967 | 646 | | 1966 | 612 | | 1965 | 576 | | 1964 | 542 | | 1963 | 514 | | 1962 | 488 | | 1961 | 467 | | 1960 | 448 |
|