Year | Value | 2022 | 48,654 | 2021 | 47,144 | 2020 | 46,327 | 2019 | 46,365 | 2018 | 46,023 | 2017 | 45,198 | 2016 | 44,883 | 2015 | 44,927 | 2014 | 45,530 | 2013 | 47,697 | 2012 | 51,962 | 2011 | 57,562 | 2010 | 63,834 | 2009 | 70,022 | 2008 | 75,466 | 2007 | 79,962 | 2006 | 83,662 | 2005 | 86,462 | 2004 | 88,767 | 2003 | 90,882 | 2002 | 91,376 | 2001 | 90,279 | 2000 | 88,929 | 1999 | 87,125 | 1998 | 84,743 | 1997 | 83,084 | 1996 | 82,629 | 1995 | 82,979 | 1994 | 84,149 | 1993 | 86,103 | 1992 | 88,914 | 1991 | 91,583 | 1990 | 93,242 | 1989 | 94,182 | 1988 | 93,970 | 1987 | 92,621 | 1986 | 90,805 | 1985 | 89,033 | 1984 | 87,933 | 1983 | 88,075 | 1982 | 89,283 | 1981 | 91,316 | 1980 | 93,890 | 1979 | 96,149 | 1978 | 97,420 | 1977 | 97,552 | 1976 | 96,479 | 1975 | 94,798 | 1974 | 93,066 | 1973 | 90,801 | 1972 | 88,579 | 1971 | 87,445 | 1970 | 86,964 | 1969 | 86,790 | 1968 | 86,934 | 1967 | 86,404 | 1966 | 84,613 | 1965 | 81,916 | 1964 | 78,634 | 1963 | 75,907 | 1962 | 74,875 | 1961 | 75,744 | 1960 | 77,902 |
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