Year | Value | 2022 | 47,865 | 2021 | 46,619 | 2020 | 45,790 | 2019 | 44,821 | 2018 | 44,361 | 2017 | 44,054 | 2016 | 43,256 | 2015 | 42,089 | 2014 | 40,672 | 2013 | 39,491 | 2012 | 39,175 | 2011 | 40,084 | 2010 | 42,237 | 2009 | 45,046 | 2008 | 47,753 | 2007 | 49,797 | 2006 | 50,846 | 2005 | 50,979 | 2004 | 50,356 | 2003 | 49,136 | 2002 | 47,833 | 2001 | 47,044 | 2000 | 46,916 | 1999 | 47,246 | 1998 | 47,808 | 1997 | 48,141 | 1996 | 47,721 | 1995 | 46,563 | 1994 | 45,001 | 1993 | 42,993 | 1992 | 40,672 | 1991 | 38,385 | 1990 | 36,436 | 1989 | 34,722 | 1988 | 32,807 | 1987 | 30,722 | 1986 | 28,841 | 1985 | 27,819 | 1984 | 28,090 | 1983 | 29,555 | 1982 | 31,909 | 1981 | 34,697 | 1980 | 37,249 | 1979 | 39,071 | 1978 | 40,168 | 1977 | 40,875 | 1976 | 41,649 | 1975 | 42,554 | 1974 | 43,259 | 1973 | 43,540 | 1972 | 43,238 | 1971 | 42,144 | 1970 | 40,378 | 1969 | 38,223 | 1968 | 35,706 | 1967 | 33,075 | 1966 | 30,880 | 1965 | 29,298 | 1964 | 28,164 | 1963 | 27,533 | 1962 | 27,366 | 1961 | 27,297 | 1960 | 27,059 |
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