| Year | Value | | 2022 | 10,889 | | 2021 | 10,687 | | 2020 | 10,588 | | 2019 | 10,499 | | 2018 | 10,420 | | 2017 | 10,346 | | 2016 | 10,221 | | 2015 | 10,035 | | 2014 | 9,813 | | 2013 | 9,557 | | 2012 | 9,269 | | 2011 | 8,981 | | 2010 | 8,741 | | 2009 | 8,476 | | 2008 | 8,254 | | 2007 | 8,096 | | 2006 | 7,868 | | 2005 | 7,576 | | 2004 | 7,252 | | 2003 | 6,928 | | 2002 | 6,681 | | 2001 | 6,564 | | 2000 | 6,476 | | 1999 | 6,505 | | 1998 | 6,670 | | 1997 | 6,844 | | 1996 | 6,903 | | 1995 | 6,775 | | 1994 | 6,544 | | 1993 | 6,226 | | 1992 | 5,908 | | 1991 | 5,682 | | 1990 | 5,539 | | 1989 | 5,447 | | 1988 | 5,354 | | 1987 | 5,183 | | 1986 | 4,929 | | 1985 | 4,645 | | 1984 | 4,362 | | 1983 | 4,184 | | 1982 | 4,151 | | 1981 | 4,209 | | 1980 | 4,296 | | 1979 | 4,358 | | 1978 | 4,383 | | 1977 | 4,366 | | 1976 | 4,312 | | 1975 | 4,220 | | 1974 | 4,091 | | 1973 | 3,927 | | 1972 | 3,739 | | 1971 | 3,556 | | 1970 | 3,401 | | 1969 | 3,274 | | 1968 | 3,177 | | 1967 | 3,109 | | 1966 | 3,049 | | 1965 | 2,984 | | 1964 | 2,915 | | 1963 | 2,843 | | 1962 | 2,768 | | 1961 | 2,693 | | 1960 | 2,622 |
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