Year | Value | 2022 | 48,531 | 2021 | 49,128 | 2020 | 49,274 | 2019 | 49,286 | 2018 | 49,690 | 2017 | 50,229 | 2016 | 51,254 | 2015 | 52,878 | 2014 | 54,575 | 2013 | 56,618 | 2012 | 59,326 | 2011 | 61,671 | 2010 | 63,518 | 2009 | 65,078 | 2008 | 65,860 | 2007 | 66,803 | 2006 | 67,908 | 2005 | 69,713 | 2004 | 71,458 | 2003 | 72,874 | 2002 | 73,956 | 2001 | 74,475 | 2000 | 74,312 | 1999 | 73,585 | 1998 | 72,919 | 1997 | 72,553 | 1996 | 72,039 | 1995 | 71,344 | 1994 | 70,891 | 1993 | 71,112 | 1992 | 72,202 | 1991 | 73,984 | 1990 | 75,741 | 1989 | 77,000 | 1988 | 77,666 | 1987 | 77,510 | 1986 | 76,178 | 1985 | 74,839 | 1984 | 74,482 | 1983 | 74,639 | 1982 | 75,335 | 1981 | 76,847 | 1980 | 78,041 | 1979 | 78,385 | 1978 | 78,768 | 1977 | 78,916 | 1976 | 78,505 | 1975 | 77,867 | 1974 | 77,233 | 1973 | 76,054 | 1972 | 74,158 | 1971 | 71,639 | 1970 | 67,184 | 1969 | 62,744 | 1968 | 61,026 | 1967 | 60,608 | 1966 | 60,557 | 1965 | 61,966 | 1964 | 63,844 | 1963 | 63,808 | 1962 | 62,761 | 1961 | 62,334 | 1960 | 62,489 |
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