Year | Value | 2022 | 48,307 | 2021 | 47,904 | 2020 | 47,618 | 2019 | 47,962 | 2018 | 47,577 | 2017 | 46,621 | 2016 | 46,471 | 2015 | 46,553 | 2014 | 46,973 | 2013 | 47,824 | 2012 | 49,122 | 2011 | 50,732 | 2010 | 52,543 | 2009 | 54,601 | 2008 | 56,982 | 2007 | 59,672 | 2006 | 62,619 | 2005 | 65,651 | 2004 | 68,235 | 2003 | 70,188 | 2002 | 71,561 | 2001 | 72,205 | 2000 | 72,067 | 1999 | 71,389 | 1998 | 70,161 | 1997 | 68,214 | 1996 | 65,853 | 1995 | 63,479 | 1994 | 61,370 | 1993 | 59,759 | 1992 | 58,742 | 1991 | 57,941 | 1990 | 57,020 | 1989 | 55,975 | 1988 | 54,924 | 1987 | 54,186 | 1986 | 54,293 | 1985 | 55,478 | 1984 | 57,517 | 1983 | 60,035 | 1982 | 62,613 | 1981 | 64,805 | 1980 | 66,249 | 1979 | 66,883 | 1978 | 66,655 | 1977 | 65,619 | 1976 | 64,211 | 1975 | 63,036 | 1974 | 62,368 | 1973 | 61,784 | 1972 | 60,831 | 1971 | 59,501 | 1970 | 57,722 | 1969 | 55,448 | 1968 | 53,211 | 1967 | 51,417 | 1966 | 49,837 | 1965 | 48,297 | 1964 | 46,779 | 1963 | 45,426 | 1962 | 44,188 | 1961 | 42,906 | 1960 | 41,361 |
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