| Year | Value | | 2022 | 13,999 | | 2021 | 13,508 | | 2020 | 12,918 | | 2019 | 12,317 | | 2018 | 11,768 | | 2017 | 11,244 | | 2016 | 10,726 | | 2015 | 10,213 | | 2014 | 9,702 | | 2013 | 9,218 | | 2012 | 8,757 | | 2011 | 8,288 | | 2010 | 7,827 | | 2009 | 7,414 | | 2008 | 7,050 | | 2007 | 6,742 | | 2006 | 6,523 | | 2005 | 6,373 | | 2004 | 6,269 | | 2003 | 6,190 | | 2002 | 6,117 | | 2001 | 6,051 | | 2000 | 5,990 | | 1999 | 5,886 | | 1998 | 5,736 | | 1997 | 5,575 | | 1996 | 5,400 | | 1995 | 5,219 | | 1994 | 5,050 | | 1993 | 4,899 | | 1992 | 4,759 | | 1991 | 4,628 | | 1990 | 4,503 | | 1989 | 4,376 | | 1988 | 4,250 | | 1987 | 4,132 | | 1986 | 4,015 | | 1985 | 3,890 | | 1984 | 3,765 | | 1983 | 3,653 | | 1982 | 3,549 | | 1981 | 3,448 | | 1980 | 3,355 | | 1979 | 3,264 | | 1978 | 3,174 | | 1977 | 3,089 | | 1976 | 3,018 | | 1975 | 2,962 | | 1974 | 2,911 | | 1973 | 2,861 | | 1972 | 2,812 | | 1971 | 2,762 | | 1970 | 2,698 | | 1969 | 2,624 | | 1968 | 2,556 | | 1967 | 2,490 | | 1966 | 2,426 | | 1965 | 2,366 | | 1964 | 2,308 | | 1963 | 2,252 | | 1962 | 2,199 | | 1961 | 2,149 | | 1960 | 2,102 |
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