| Year | Value | | 2022 | 5,876 | | 2021 | 5,916 | | 2020 | 5,942 | | 2019 | 5,931 | | 2018 | 5,879 | | 2017 | 5,789 | | 2016 | 5,660 | | 2015 | 5,493 | | 2014 | 5,305 | | 2013 | 5,119 | | 2012 | 4,933 | | 2011 | 4,735 | | 2010 | 4,534 | | 2009 | 4,304 | | 2008 | 4,047 | | 2007 | 3,801 | | 2006 | 3,583 | | 2005 | 3,390 | | 2004 | 3,215 | | 2003 | 3,081 | | 2002 | 3,004 | | 2001 | 2,969 | | 2000 | 2,915 | | 1999 | 2,811 | | 1998 | 2,675 | | 1997 | 2,519 | | 1996 | 2,363 | | 1995 | 2,239 | | 1994 | 2,144 | | 1993 | 2,057 | | 1992 | 1,969 | | 1991 | 1,884 | | 1990 | 1,807 | | 1989 | 1,739 | | 1988 | 1,678 | | 1987 | 1,625 | | 1986 | 1,582 | | 1985 | 1,550 | | 1984 | 1,525 | | 1983 | 1,507 | | 1982 | 1,498 | | 1981 | 1,494 | | 1980 | 1,500 | | 1979 | 1,517 | | 1978 | 1,539 | | 1977 | 1,560 | | 1976 | 1,580 | | 1975 | 1,597 | | 1974 | 1,611 | | 1973 | 1,619 | | 1972 | 1,623 | | 1971 | 1,618 | | 1970 | 1,603 | | 1969 | 1,589 | | 1968 | 1,579 | | 1967 | 1,569 | | 1966 | 1,555 | | 1965 | 1,535 | | 1964 | 1,511 | | 1963 | 1,482 | | 1962 | 1,447 | | 1961 | 1,410 | | 1960 | 1,374 |
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