| Year | Value | | 2022 | 3,976 | | 2021 | 3,265 | | 2020 | 3,215 | | 2019 | 3,176 | | 2018 | 3,154 | | 2017 | 3,139 | | 2016 | 3,121 | | 2015 | 3,108 | | 2014 | 3,050 | | 2013 | 2,975 | | 2012 | 2,873 | | 2011 | 2,774 | | 2010 | 2,734 | | 2009 | 2,515 | | 2008 | 2,350 | | 2007 | 2,144 | | 2006 | 1,993 | | 2005 | 1,841 | | 2004 | 1,749 | | 2003 | 1,692 | | 2002 | 1,653 | | 2001 | 1,551 | | 2000 | 1,509 | | 1999 | 1,468 | | 1998 | 1,412 | | 1997 | 1,319 | | 1996 | 1,241 | | 1995 | 1,203 | | 1994 | 1,169 | | 1993 | 1,123 | | 1992 | 1,089 | | 1991 | 1,086 | | 1990 | 1,085 | | 1989 | 1,099 | | 1988 | 1,118 | | 1987 | 1,141 | | 1986 | 1,115 | | 1985 | 1,120 | | 1984 | 1,116 | | 1983 | 1,108 | | 1982 | 1,103 | | 1981 | 1,090 | | 1980 | 1,074 | | 1979 | 1,060 | | 1978 | 1,048 | | 1977 | 1,047 | | 1976 | 1,033 | | 1975 | 1,020 | | 1974 | 1,007 | | 1973 | 998 | | 1972 | 993 | | 1971 | 980 | | 1970 | 967 | | 1969 | 949 | | 1968 | 932 | | 1967 | 915 | | 1966 | 904 | | 1965 | 895 | | 1964 | 888 | | 1963 | 880 | | 1962 | 873 | | 1961 | 863 | | 1960 | 852 |
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