Year | Value | 2022 | 15,445 | 2021 | 15,308 | 2020 | 15,371 | 2019 | 15,041 | 2018 | 14,519 | 2017 | 14,047 | 2016 | 13,713 | 2015 | 13,645 | 2014 | 13,752 | 2013 | 13,961 | 2012 | 14,338 | 2011 | 14,870 | 2010 | 15,290 | 2009 | 15,382 | 2008 | 15,247 | 2007 | 14,576 | 2006 | 13,187 | 2005 | 11,694 | 2004 | 10,443 | 2003 | 9,421 | 2002 | 8,917 | 2001 | 9,051 | 2000 | 9,357 | 1999 | 9,520 | 1998 | 9,507 | 1997 | 9,433 | 1996 | 9,379 | 1995 | 9,296 | 1994 | 9,207 | 1993 | 9,096 | 1992 | 8,902 | 1991 | 8,663 | 1990 | 8,344 | 1989 | 8,240 | 1988 | 8,219 | 1987 | 8,246 | 1986 | 8,236 | 1985 | 8,082 | 1984 | 7,845 | 1983 | 7,660 | 1982 | 7,325 | 1981 | 6,928 | 1980 | 6,641 | 1979 | 6,409 | 1978 | 6,286 | 1977 | 6,257 | 1976 | 6,351 | 1975 | 6,487 | 1974 | 6,631 | 1973 | 6,846 | 1972 | 7,062 | 1971 | 7,270 | 1970 | 7,445 | 1969 | 7,583 | 1968 | 7,663 | 1967 | 7,639 | 1966 | 7,502 | 1965 | 7,258 | 1964 | 6,956 | 1963 | 6,668 | 1962 | 6,448 | 1961 | 6,318 | 1960 | 6,290 |
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