| Year | Value | | 2022 | 9,090 | | 2021 | 8,839 | | 2020 | 8,631 | | 2019 | 8,469 | | 2018 | 8,337 | | 2017 | 8,206 | | 2016 | 8,080 | | 2015 | 7,946 | | 2014 | 7,786 | | 2013 | 7,620 | | 2012 | 7,450 | | 2011 | 7,286 | | 2010 | 7,128 | | 2009 | 6,995 | | 2008 | 6,884 | | 2007 | 6,753 | | 2006 | 6,589 | | 2005 | 6,430 | | 2004 | 6,281 | | 2003 | 6,143 | | 2002 | 6,029 | | 2001 | 5,921 | | 2000 | 5,806 | | 1999 | 5,700 | | 1998 | 5,580 | | 1997 | 5,440 | | 1996 | 5,309 | | 1995 | 5,208 | | 1994 | 5,129 | | 1993 | 5,059 | | 1992 | 5,011 | | 1991 | 4,981 | | 1990 | 4,955 | | 1989 | 4,902 | | 1988 | 4,835 | | 1987 | 4,758 | | 1986 | 4,586 | | 1985 | 4,350 | | 1984 | 4,170 | | 1983 | 4,038 | | 1982 | 3,933 | | 1981 | 3,841 | | 1980 | 3,753 | | 1979 | 3,548 | | 1978 | 3,344 | | 1977 | 3,311 | | 1976 | 3,329 | | 1975 | 3,308 | | 1974 | 3,247 | | 1973 | 3,176 | | 1972 | 3,116 | | 1971 | 3,052 | | 1970 | 2,993 | | 1969 | 2,975 | | 1968 | 2,975 | | 1967 | 2,957 | | 1966 | 2,877 | | 1965 | 2,778 | | 1964 | 2,739 | | 1963 | 2,718 | | 1962 | 2,697 | | 1961 | 2,669 | | 1960 | 2,632 |
|