Year | Value | 2022 | 18,649 | 2021 | 17,837 | 2020 | 17,240 | 2019 | 16,754 | 2018 | 16,282 | 2017 | 15,854 | 2016 | 15,153 | 2015 | 14,523 | 2014 | 14,038 | 2013 | 13,572 | 2012 | 13,194 | 2011 | 12,919 | 2010 | 12,528 | 2009 | 11,969 | 2008 | 11,503 | 2007 | 11,108 | 2006 | 10,767 | 2005 | 10,576 | 2004 | 10,607 | 2003 | 10,670 | 2002 | 10,599 | 2001 | 10,525 | 2000 | 10,652 | 1999 | 10,701 | 1998 | 10,539 | 1997 | 10,452 | 1996 | 10,545 | 1995 | 10,781 | 1994 | 11,000 | 1993 | 11,150 | 1992 | 11,278 | 1991 | 11,312 | 1990 | 11,172 | 1989 | 10,979 | 1988 | 10,883 | 1987 | 10,784 | 1986 | 10,627 | 1985 | 10,578 | 1984 | 10,422 | 1983 | 9,862 | 1982 | 9,208 | 1981 | 8,652 | 1980 | 8,236 | 1979 | 8,215 | 1978 | 8,713 | 1977 | 9,457 | 1976 | 10,090 | 1975 | 10,475 | 1974 | 10,591 | 1973 | 10,614 | 1972 | 10,628 | 1971 | 10,663 | 1970 | 10,743 | 1969 | 10,752 | 1968 | 10,637 | 1967 | 10,556 | 1966 | 10,515 | 1965 | 10,410 | 1964 | 10,249 | 1963 | 10,068 | 1962 | 9,788 | 1961 | 9,449 | 1960 | 9,159 |
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