Year | Value | 2022 | 39,495 | 2021 | 39,540 | 2020 | 39,587 | 2019 | 39,671 | 2018 | 39,719 | 2017 | 39,736 | 2016 | 39,770 | 2015 | 39,920 | 2014 | 40,134 | 2013 | 40,308 | 2012 | 40,443 | 2011 | 40,478 | 2010 | 40,242 | 2009 | 39,819 | 2008 | 39,393 | 2007 | 38,977 | 2006 | 38,572 | 2005 | 38,195 | 2004 | 37,854 | 2003 | 37,513 | 2002 | 37,163 | 2001 | 36,799 | 2000 | 36,404 | 1999 | 35,979 | 1998 | 35,531 | 1997 | 35,086 | 1996 | 34,701 | 1995 | 34,453 | 1994 | 34,287 | 1993 | 34,108 | 1992 | 33,920 | 1991 | 33,668 | 1990 | 33,230 | 1989 | 32,685 | 1988 | 32,149 | 1987 | 31,625 | 1986 | 31,193 | 1985 | 31,052 | 1984 | 31,109 | 1983 | 31,154 | 1982 | 31,179 | 1981 | 31,130 | 1980 | 30,869 | 1979 | 30,456 | 1978 | 30,050 | 1977 | 29,649 | 1976 | 29,258 | 1975 | 28,534 | 1974 | 27,699 | 1973 | 26,839 | 1972 | 25,971 | 1971 | 25,080 | 1970 | 24,425 | 1969 | 23,808 | 1968 | 23,201 | 1967 | 22,601 | 1966 | 22,078 | 1965 | 21,872 | 1964 | 21,790 | 1963 | 21,703 | 1962 | 21,616 | 1961 | 21,623 | 1960 | 21,897 |
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