Year | Value | 2022 | 16,980 | 2021 | 16,942 | 2020 | 16,829 | 2019 | 16,575 | 2018 | 16,123 | 2017 | 15,548 | 2016 | 15,021 | 2015 | 14,624 | 2014 | 14,298 | 2013 | 14,045 | 2012 | 13,919 | 2011 | 13,872 | 2010 | 13,823 | 2009 | 13,879 | 2008 | 13,987 | 2007 | 14,026 | 2006 | 13,968 | 2005 | 13,830 | 2004 | 13,768 | 2003 | 13,856 | 2002 | 13,960 | 2001 | 14,010 | 2000 | 14,098 | 1999 | 14,127 | 1998 | 13,998 | 1997 | 13,867 | 1996 | 13,819 | 1995 | 13,828 | 1994 | 13,899 | 1993 | 14,055 | 1992 | 14,209 | 1991 | 14,197 | 1990 | 13,979 | 1989 | 13,609 | 1988 | 13,068 | 1987 | 12,405 | 1986 | 11,775 | 1985 | 11,175 | 1984 | 10,605 | 1983 | 10,075 | 1982 | 9,530 | 1981 | 8,943 | 1980 | 8,370 | 1979 | 7,880 | 1978 | 7,503 | 1977 | 7,253 | 1976 | 7,135 | 1975 | 7,125 | 1974 | 7,189 | 1973 | 7,294 | 1972 | 7,401 | 1971 | 7,451 | 1970 | 7,371 | 1969 | 7,172 | 1968 | 6,911 | 1967 | 6,602 | 1966 | 6,252 | 1965 | 5,884 | 1964 | 5,526 | 1963 | 5,142 | 1962 | 4,743 | 1961 | 4,393 | 1960 | 4,088 |
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