| Year | Value | | 2022 | 8,700 | | 2021 | 8,213 | | 2020 | 7,612 | | 2019 | 6,921 | | 2018 | 6,164 | | 2017 | 5,413 | | 2016 | 4,736 | | 2015 | 4,159 | | 2014 | 3,693 | | 2013 | 3,393 | | 2012 | 3,223 | | 2011 | 3,090 | | 2010 | 2,991 | | 2009 | 2,928 | | 2008 | 2,912 | | 2007 | 2,948 | | 2006 | 3,027 | | 2005 | 3,131 | | 2004 | 3,234 | | 2003 | 3,328 | | 2002 | 3,401 | | 2001 | 3,443 | | 2000 | 3,437 | | 1999 | 3,374 | | 1998 | 3,279 | | 1997 | 3,181 | | 1996 | 3,079 | | 1995 | 2,972 | | 1994 | 2,881 | | 1993 | 2,799 | | 1992 | 2,718 | | 1991 | 2,650 | | 1990 | 2,586 | | 1989 | 2,484 | | 1988 | 2,355 | | 1987 | 2,238 | | 1986 | 2,139 | | 1985 | 2,056 | | 1984 | 1,969 | | 1983 | 1,873 | | 1982 | 1,784 | | 1981 | 1,708 | | 1980 | 1,644 | | 1979 | 1,595 | | 1978 | 1,558 | | 1977 | 1,517 | | 1976 | 1,464 | | 1975 | 1,411 | | 1974 | 1,363 | | 1973 | 1,323 | | 1972 | 1,287 | | 1971 | 1,254 | | 1970 | 1,218 | | 1969 | 1,179 | | 1968 | 1,138 | | 1967 | 1,110 | | 1966 | 1,112 | | 1965 | 1,129 | | 1964 | 1,128 | | 1963 | 1,112 | | 1962 | 1,104 | | 1961 | 1,100 | | 1960 | 1,091 |
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