| Year | Value | | 2022 | 3,329 | | 2021 | 3,209 | | 2020 | 3,107 | | 2019 | 3,050 | | 2018 | 3,000 | | 2017 | 3,002 | | 2016 | 3,069 | | 2015 | 3,106 | | 2014 | 3,114 | | 2013 | 3,125 | | 2012 | 3,120 | | 2011 | 3,075 | | 2010 | 3,028 | | 2009 | 3,035 | | 2008 | 3,061 | | 2007 | 3,045 | | 2006 | 3,028 | | 2005 | 3,024 | | 2004 | 3,013 | | 2003 | 3,015 | | 2002 | 3,035 | | 2001 | 3,052 | | 2000 | 3,061 | | 1999 | 3,086 | | 1998 | 3,122 | | 1997 | 3,154 | | 1996 | 3,173 | | 1995 | 3,174 | | 1994 | 3,101 | | 1993 | 2,917 | | 1992 | 2,671 | | 1991 | 2,509 | | 1990 | 2,451 | | 1989 | 2,360 | | 1988 | 2,240 | | 1987 | 2,114 | | 1986 | 1,981 | | 1985 | 1,859 | | 1984 | 1,783 | | 1983 | 1,746 | | 1982 | 1,711 | | 1981 | 1,680 | | 1980 | 1,646 | | 1979 | 1,616 | | 1978 | 1,588 | | 1977 | 1,566 | | 1976 | 1,550 | | 1975 | 1,534 | | 1974 | 1,522 | | 1973 | 1,510 | | 1972 | 1,495 | | 1971 | 1,480 | | 1970 | 1,457 | | 1969 | 1,427 | | 1968 | 1,399 | | 1967 | 1,369 | | 1966 | 1,337 | | 1965 | 1,303 | | 1964 | 1,269 | | 1963 | 1,238 | | 1962 | 1,207 | | 1961 | 1,176 | | 1960 | 1,147 |
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