| Year | Value | | 2022 | 8,302 | | 2021 | 7,785 | | 2020 | 7,248 | | 2019 | 6,696 | | 2018 | 6,153 | | 2017 | 5,634 | | 2016 | 5,142 | | 2015 | 4,685 | | 2014 | 4,259 | | 2013 | 3,861 | | 2012 | 3,505 | | 2011 | 3,222 | | 2010 | 3,035 | | 2009 | 2,875 | | 2008 | 2,727 | | 2007 | 2,645 | | 2006 | 2,619 | | 2005 | 2,635 | | 2004 | 2,691 | | 2003 | 2,778 | | 2002 | 2,873 | | 2001 | 2,959 | | 2000 | 3,029 | | 1999 | 3,139 | | 1998 | 3,292 | | 1997 | 3,433 | | 1996 | 3,556 | | 1995 | 3,661 | | 1994 | 3,735 | | 1993 | 3,774 | | 1992 | 3,783 | | 1991 | 3,766 | | 1990 | 3,727 | | 1989 | 3,659 | | 1988 | 3,560 | | 1987 | 3,457 | | 1986 | 3,360 | | 1985 | 3,273 | | 1984 | 3,198 | | 1983 | 3,138 | | 1982 | 3,092 | | 1981 | 3,058 | | 1980 | 3,054 | | 1979 | 3,090 | | 1978 | 3,141 | | 1977 | 3,189 | | 1976 | 3,237 | | 1975 | 3,287 | | 1974 | 3,337 | | 1973 | 3,388 | | 1972 | 3,437 | | 1971 | 3,476 | | 1970 | 3,483 | | 1969 | 3,419 | | 1968 | 3,304 | | 1967 | 3,177 | | 1966 | 3,042 | | 1965 | 2,901 | | 1964 | 2,754 | | 1963 | 2,601 | | 1962 | 2,441 | | 1961 | 2,307 | | 1960 | 2,184 |
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