Year | Value | 2022 | 49,137 | 2021 | 49,510 | 2020 | 49,866 | 2019 | 50,196 | 2018 | 50,489 | 2017 | 50,759 | 2016 | 50,999 | 2015 | 51,208 | 2014 | 51,384 | 2013 | 51,529 | 2012 | 51,650 | 2011 | 51,741 | 2010 | 51,796 | 2009 | 51,855 | 2008 | 51,890 | 2007 | 51,869 | 2006 | 51,877 | 2005 | 51,898 | 2004 | 51,874 | 2003 | 51,854 | 2002 | 51,818 | 2001 | 51,805 | 2000 | 51,887 | 1999 | 51,971 | 1998 | 52,048 | 1997 | 52,070 | 1996 | 52,047 | 1995 | 52,015 | 1994 | 51,871 | 1993 | 51,595 | 1992 | 51,255 | 1991 | 50,908 | 1990 | 50,512 | 1989 | 49,013 | 1988 | 48,879 | 1987 | 48,757 | 1986 | 48,636 | 1985 | 48,519 | 1984 | 48,379 | 1983 | 48,204 | 1982 | 48,025 | 1981 | 47,888 | 1980 | 47,752 | 1979 | 46,165 | 1978 | 46,232 | 1977 | 45,107 | 1976 | 46,736 | 1975 | 46,120 | 1974 | 44,096 | 1973 | 41,428 | 1972 | 37,774 | 1971 | 35,307 | 1970 | 31,689 | 1969 | 30,133 | 1968 | 27,903 | 1967 | 24,665 | 1966 | 23,276 | 1965 | 21,984 | 1964 | 20,674 | 1963 | 20,212 | 1962 | 17,818 | 1961 | 17,510 | 1960 | 16,373 |
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