Year % of total population 1960 47.337 1961 47.636 1962 47.936 1963 48.236 1964 48.536 1965 48.836 1966 49.136 1967 49.436 1968 49.737 1969 50.037 1970 49.992 1971 49.538 1972 49.083 1973 48.629 1974 48.302 1975 48.103 1976 47.904 1977 47.706 1978 47.508 1979 47.345 1980 47.223 1981 47.103 1982 46.982 1983 46.861 1984 46.701 1985 46.502 1986 46.303 1987 46.105 1988 45.906 1989 45.943 1990 46.251 1991 46.559 1992 46.868 1993 47.176 1994 47.485 1995 47.794 1996 48.104 1997 48.412 1998 48.722 1999 48.815 2000 48.614 2001 48.413 2002 48.213 2003 48.012 2004 47.811 2005 47.611 2006 47.411 2007 47.21 2008 47.01 2009 46.81 2010 46.594 2011 46.363 2012 46.117 2013 45.855 2014 45.578 2015 45.286 2016 44.979 2017 44.657 2018 44.32 2019 43.969 2020 43.603 2021 43.224 2022 42.83 2023 42.423