Year | Value | 2022 | 17,975 | 2021 | 17,879 | 2020 | 17,712 | 2019 | 17,399 | 2018 | 16,834 | 2017 | 16,177 | 2016 | 15,662 | 2015 | 15,302 | 2014 | 15,039 | 2013 | 14,958 | 2012 | 14,973 | 2011 | 14,940 | 2010 | 14,914 | 2009 | 14,882 | 2008 | 14,744 | 2007 | 14,606 | 2006 | 14,534 | 2005 | 14,416 | 2004 | 14,374 | 2003 | 14,477 | 2002 | 14,562 | 2001 | 14,593 | 2000 | 14,622 | 1999 | 14,577 | 1998 | 14,498 | 1997 | 14,443 | 1996 | 14,350 | 1995 | 14,241 | 1994 | 14,249 | 1993 | 14,323 | 1992 | 14,345 | 1991 | 14,286 | 1990 | 14,085 | 1989 | 13,763 | 1988 | 13,304 | 1987 | 12,716 | 1986 | 12,066 | 1985 | 11,416 | 1984 | 10,777 | 1983 | 10,129 | 1982 | 9,486 | 1981 | 8,878 | 1980 | 8,356 | 1979 | 7,930 | 1978 | 7,593 | 1977 | 7,358 | 1976 | 7,211 | 1975 | 7,137 | 1974 | 7,118 | 1973 | 7,136 | 1972 | 7,158 | 1971 | 7,136 | 1970 | 7,018 | 1969 | 6,783 | 1968 | 6,484 | 1967 | 6,186 | 1966 | 5,897 | 1965 | 5,628 | 1964 | 5,378 | 1963 | 5,131 | 1962 | 4,890 | 1961 | 4,663 | 1960 | 4,453 |
|