| Year | Value | | 2022 | 2,213 | | 2021 | 2,405 | | 2020 | 2,603 | | 2019 | 2,745 | | 2018 | 2,832 | | 2017 | 2,873 | | 2016 | 2,895 | | 2015 | 2,957 | | 2014 | 3,034 | | 2013 | 3,100 | | 2012 | 3,160 | | 2011 | 3,246 | | 2010 | 3,399 | | 2009 | 3,282 | | 2008 | 2,875 | | 2007 | 2,511 | | 2006 | 2,191 | | 2005 | 1,916 | | 2004 | 1,688 | | 2003 | 1,507 | | 2002 | 1,364 | | 2001 | 1,254 | | 2000 | 1,175 | | 1999 | 1,145 | | 1998 | 1,150 | | 1997 | 1,162 | | 1996 | 1,177 | | 1995 | 1,194 | | 1994 | 1,207 | | 1993 | 1,216 | | 1992 | 1,218 | | 1991 | 1,222 | | 1990 | 1,232 | | 1989 | 1,235 | | 1988 | 1,224 | | 1987 | 1,204 | | 1986 | 1,178 | | 1985 | 1,144 | | 1984 | 1,104 | | 1983 | 1,056 | | 1982 | 994 | | 1981 | 918 | | 1980 | 833 | | 1979 | 745 | | 1978 | 661 | | 1977 | 586 | | 1976 | 522 | | 1975 | 466 | | 1974 | 420 | | 1973 | 381 | | 1972 | 349 | | 1971 | 324 | | 1970 | 300 | | 1969 | 275 | | 1968 | 257 | | 1967 | 237 | | 1966 | 220 | | 1965 | 204 | | 1964 | 192 | | 1963 | 184 | | 1962 | 177 | | 1961 | 174 | | 1960 | 176 |
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