| Year | Value | | 2022 | 7,811 | | 2021 | 7,310 | | 2020 | 6,870 | | 2019 | 6,455 | | 2018 | 6,099 | | 2017 | 5,855 | | 2016 | 5,667 | | 2015 | 5,417 | | 2014 | 5,186 | | 2013 | 5,010 | | 2012 | 4,835 | | 2011 | 4,703 | | 2010 | 4,619 | | 2009 | 4,526 | | 2008 | 4,395 | | 2007 | 4,251 | | 2006 | 4,108 | | 2005 | 3,997 | | 2004 | 3,873 | | 2003 | 3,720 | | 2002 | 3,588 | | 2001 | 3,447 | | 2000 | 3,269 | | 1999 | 3,134 | | 1998 | 3,054 | | 1997 | 2,939 | | 1996 | 2,825 | | 1995 | 2,726 | | 1994 | 2,578 | | 1993 | 2,452 | | 1992 | 2,418 | | 1991 | 2,402 | | 1990 | 2,358 | | 1989 | 2,366 | | 1988 | 2,426 | | 1987 | 2,460 | | 1986 | 2,470 | | 1985 | 2,466 | | 1984 | 2,419 | | 1983 | 2,333 | | 1982 | 2,241 | | 1981 | 2,158 | | 1980 | 2,087 | | 1979 | 2,028 | | 1978 | 1,982 | | 1977 | 1,933 | | 1976 | 1,872 | | 1975 | 1,801 | | 1974 | 1,725 | | 1973 | 1,651 | | 1972 | 1,584 | | 1971 | 1,527 | | 1970 | 1,476 | | 1969 | 1,414 | | 1968 | 1,341 | | 1967 | 1,272 | | 1966 | 1,208 | | 1965 | 1,156 | | 1964 | 1,118 | | 1963 | 1,078 | | 1962 | 1,038 | | 1961 | 1,009 | | 1960 | 988 |
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