| Year | Value | | 2022 | 4,411 | | 2021 | 4,400 | | 2020 | 4,425 | | 2019 | 4,483 | | 2018 | 4,568 | | 2017 | 4,671 | | 2016 | 4,560 | | 2015 | 4,233 | | 2014 | 3,924 | | 2013 | 3,636 | | 2012 | 3,373 | | 2011 | 3,139 | | 2010 | 2,942 | | 2009 | 2,789 | | 2008 | 2,673 | | 2007 | 2,588 | | 2006 | 2,532 | | 2005 | 2,437 | | 2004 | 2,207 | | 2003 | 1,915 | | 2002 | 1,657 | | 2001 | 1,433 | | 2000 | 1,243 | | 1999 | 1,085 | | 1998 | 987 | | 1997 | 937 | | 1996 | 889 | | 1995 | 845 | | 1994 | 809 | | 1993 | 783 | | 1992 | 794 | | 1991 | 805 | | 1990 | 770 | | 1989 | 728 | | 1988 | 691 | | 1987 | 657 | | 1986 | 623 | | 1985 | 593 | | 1984 | 565 | | 1983 | 536 | | 1982 | 508 | | 1981 | 483 | | 1980 | 459 | | 1979 | 438 | | 1978 | 416 | | 1977 | 395 | | 1976 | 377 | | 1975 | 360 | | 1974 | 341 | | 1973 | 324 | | 1972 | 309 | | 1971 | 293 | | 1970 | 276 | | 1969 | 261 | | 1968 | 250 | | 1967 | 240 | | 1966 | 231 | | 1965 | 223 | | 1964 | 217 | | 1963 | 210 | | 1962 | 203 | | 1961 | 197 | | 1960 | 193 |
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