| Year | Value | | 2022 | 3,019 | | 2021 | 2,937 | | 2020 | 2,840 | | 2019 | 2,738 | | 2018 | 2,624 | | 2017 | 2,504 | | 2016 | 2,393 | | 2015 | 2,286 | | 2014 | 2,181 | | 2013 | 2,081 | | 2012 | 1,987 | | 2011 | 1,891 | | 2010 | 1,777 | | 2009 | 1,652 | | 2008 | 1,540 | | 2007 | 1,446 | | 2006 | 1,388 | | 2005 | 1,370 | | 2004 | 1,386 | | 2003 | 1,431 | | 2002 | 1,474 | | 2001 | 1,523 | | 2000 | 1,552 | | 1999 | 1,535 | | 1998 | 1,503 | | 1997 | 1,457 | | 1996 | 1,405 | | 1995 | 1,353 | | 1994 | 1,306 | | 1993 | 1,266 | | 1992 | 1,233 | | 1991 | 1,202 | | 1990 | 1,194 | | 1989 | 1,194 | | 1988 | 1,179 | | 1987 | 1,154 | | 1986 | 1,124 | | 1985 | 1,096 | | 1984 | 1,076 | | 1983 | 1,068 | | 1982 | 1,071 | | 1981 | 1,082 | | 1980 | 1,093 | | 1979 | 1,102 | | 1978 | 1,109 | | 1977 | 1,111 | | 1976 | 1,109 | | 1975 | 1,108 | | 1974 | 1,115 | | 1973 | 1,132 | | 1972 | 1,156 | | 1971 | 1,182 | | 1970 | 1,198 | | 1969 | 1,187 | | 1968 | 1,147 | | 1967 | 1,097 | | 1966 | 1,043 | | 1965 | 991 | | 1964 | 946 | | 1963 | 910 | | 1962 | 881 | | 1961 | 859 | | 1960 | 839 |
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