| Year | Value | | 2022 | 2,950 | | 2021 | 2,820 | | 2020 | 2,695 | | 2019 | 2,581 | | 2018 | 2,495 | | 2017 | 2,438 | | 2016 | 2,406 | | 2015 | 2,387 | | 2014 | 2,372 | | 2013 | 2,345 | | 2012 | 2,299 | | 2011 | 2,241 | | 2010 | 2,179 | | 2009 | 2,086 | | 2008 | 1,977 | | 2007 | 1,899 | | 2006 | 1,849 | | 2005 | 1,829 | | 2004 | 1,852 | | 2003 | 1,915 | | 2002 | 2,000 | | 2001 | 2,074 | | 2000 | 2,068 | | 1999 | 1,984 | | 1998 | 1,878 | | 1997 | 1,769 | | 1996 | 1,666 | | 1995 | 1,573 | | 1994 | 1,489 | | 1993 | 1,417 | | 1992 | 1,354 | | 1991 | 1,323 | | 1990 | 1,323 | | 1989 | 1,319 | | 1988 | 1,310 | | 1987 | 1,299 | | 1986 | 1,285 | | 1985 | 1,261 | | 1984 | 1,231 | | 1983 | 1,194 | | 1982 | 1,155 | | 1981 | 1,114 | | 1980 | 1,077 | | 1979 | 1,045 | | 1978 | 1,013 | | 1977 | 981 | | 1976 | 947 | | 1975 | 916 | | 1974 | 886 | | 1973 | 857 | | 1972 | 830 | | 1971 | 804 | | 1970 | 777 | | 1969 | 751 | | 1968 | 731 | | 1967 | 711 | | 1966 | 692 | | 1965 | 675 | | 1964 | 656 | | 1963 | 638 | | 1962 | 622 | | 1961 | 603 | | 1960 | 585 |
|