| Year | Value | | 2022 | 4,723 | | 2021 | 4,480 | | 2020 | 4,266 | | 2019 | 4,101 | | 2018 | 3,968 | | 2017 | 3,842 | | 2016 | 3,711 | | 2015 | 3,586 | | 2014 | 3,491 | | 2013 | 3,434 | | 2012 | 3,405 | | 2011 | 3,388 | | 2010 | 3,358 | | 2009 | 3,288 | | 2008 | 3,176 | | 2007 | 3,039 | | 2006 | 2,880 | | 2005 | 2,721 | | 2004 | 2,580 | | 2003 | 2,459 | | 2002 | 2,351 | | 2001 | 2,259 | | 2000 | 2,185 | | 1999 | 2,110 | | 1998 | 2,032 | | 1997 | 1,959 | | 1996 | 1,895 | | 1995 | 1,842 | | 1994 | 1,802 | | 1993 | 1,777 | | 1992 | 1,761 | | 1991 | 1,754 | | 1990 | 1,750 | | 1989 | 1,753 | | 1988 | 1,766 | | 1987 | 1,784 | | 1986 | 1,803 | | 1985 | 1,820 | | 1984 | 1,834 | | 1983 | 1,845 | | 1982 | 1,851 | | 1981 | 1,811 | | 1980 | 1,735 | | 1979 | 1,677 | | 1978 | 1,636 | | 1977 | 1,603 | | 1976 | 1,566 | | 1975 | 1,530 | | 1974 | 1,493 | | 1973 | 1,448 | | 1972 | 1,404 | | 1971 | 1,364 | | 1970 | 1,339 | | 1969 | 1,341 | | 1968 | 1,346 | | 1967 | 1,340 | | 1966 | 1,325 | | 1965 | 1,310 | | 1964 | 1,295 | | 1963 | 1,279 | | 1962 | 1,265 | | 1961 | 1,251 | | 1960 | 1,251 |
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