Year | Value | 2022 | 32,109 | 2021 | 32,831 | 2020 | 33,444 | 2019 | 33,202 | 2018 | 32,201 | 2017 | 31,133 | 2016 | 29,974 | 2015 | 28,688 | 2014 | 27,358 | 2013 | 26,031 | 2012 | 24,947 | 2011 | 24,100 | 2010 | 23,302 | 2009 | 22,538 | 2008 | 21,807 | 2007 | 21,094 | 2006 | 20,313 | 2005 | 19,463 | 2004 | 18,638 | 2003 | 17,918 | 2002 | 17,347 | 2001 | 17,059 | 2000 | 16,757 | 1999 | 16,622 | 1998 | 16,587 | 1997 | 16,705 | 1996 | 16,981 | 1995 | 17,218 | 1994 | 17,384 | 1993 | 17,289 | 1992 | 16,936 | 1991 | 16,297 | 1990 | 15,418 | 1989 | 14,481 | 1988 | 13,584 | 1987 | 12,820 | 1986 | 12,214 | 1985 | 11,727 | 1984 | 11,329 | 1983 | 10,994 | 1982 | 10,645 | 1981 | 10,230 | 1980 | 9,800 | 1979 | 9,357 | 1978 | 8,918 | 1977 | 8,545 | 1976 | 8,276 | 1975 | 8,114 | 1974 | 8,018 | 1973 | 7,961 | 1972 | 7,921 | 1971 | 7,890 | 1970 | 7,870 | 1969 | 7,831 | 1968 | 7,720 | 1967 | 7,501 | 1966 | 7,189 | 1965 | 6,923 | 1964 | 6,751 | 1963 | 6,606 | 1962 | 6,462 | 1961 | 6,288 | 1960 | 6,123 |
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