Year | Value | 2022 | 15,873 | 2021 | 15,481 | 2020 | 16,033 | 2019 | 16,829 | 2018 | 17,652 | 2017 | 18,208 | 2016 | 18,114 | 2015 | 17,749 | 2014 | 17,196 | 2013 | 16,453 | 2012 | 15,852 | 2011 | 15,440 | 2010 | 15,348 | 2009 | 15,531 | 2008 | 15,797 | 2007 | 15,912 | 2006 | 15,676 | 2005 | 15,022 | 2004 | 14,176 | 2003 | 13,370 | 2002 | 12,405 | 2001 | 11,504 | 2000 | 10,858 | 1999 | 10,192 | 1998 | 9,643 | 1997 | 9,053 | 1996 | 8,384 | 1995 | 8,200 | 1994 | 8,609 | 1993 | 9,033 | 1992 | 9,809 | 1991 | 10,905 | 1990 | 11,508 | 1989 | 11,675 | 1988 | 11,673 | 1987 | 11,565 | 1986 | 11,419 | 1985 | 11,342 | 1984 | 11,301 | 1983 | 11,310 | 1982 | 11,295 | 1981 | 11,113 | 1980 | 10,926 | 1979 | 10,736 | 1978 | 10,386 | 1977 | 9,910 | 1976 | 9,453 | 1975 | 9,148 | 1974 | 8,831 | 1973 | 8,471 | 1972 | 8,241 | 1971 | 8,189 | 1970 | 8,153 | 1969 | 8,122 | 1968 | 8,179 | 1967 | 8,145 | 1966 | 8,010 | 1965 | 7,829 | 1964 | 7,620 | 1963 | 7,459 | 1962 | 7,377 | 1961 | 7,233 | 1960 | 7,058 |
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