| Year | Value | | 2022 | 4,753 | | 2021 | 3,877 | | 2020 | 3,740 | | 2019 | 3,598 | | 2018 | 3,516 | | 2017 | 3,468 | | 2016 | 3,415 | | 2015 | 3,358 | | 2014 | 3,281 | | 2013 | 3,241 | | 2012 | 3,200 | | 2011 | 3,194 | | 2010 | 3,317 | | 2009 | 3,246 | | 2008 | 3,215 | | 2007 | 3,096 | | 2006 | 2,999 | | 2005 | 2,817 | | 2004 | 2,649 | | 2003 | 2,489 | | 2002 | 2,351 | | 2001 | 2,140 | | 2000 | 2,027 | | 1999 | 1,929 | | 1998 | 1,834 | | 1997 | 1,702 | | 1996 | 1,593 | | 1995 | 1,542 | | 1994 | 1,493 | | 1993 | 1,416 | | 1992 | 1,345 | | 1991 | 1,295 | | 1990 | 1,238 | | 1989 | 1,201 | | 1988 | 1,172 | | 1987 | 1,162 | | 1986 | 1,125 | | 1985 | 1,136 | | 1984 | 1,150 | | 1983 | 1,171 | | 1982 | 1,199 | | 1981 | 1,217 | | 1980 | 1,221 | | 1979 | 1,221 | | 1978 | 1,215 | | 1977 | 1,216 | | 1976 | 1,198 | | 1975 | 1,181 | | 1974 | 1,163 | | 1973 | 1,150 | | 1972 | 1,134 | | 1971 | 1,103 | | 1970 | 1,087 | | 1969 | 1,075 | | 1968 | 1,061 | | 1967 | 1,047 | | 1966 | 1,029 | | 1965 | 1,009 | | 1964 | 991 | | 1963 | 975 | | 1962 | 960 | | 1961 | 947 | | 1960 | 939 |
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