Year % of total population 1960 49.9084212068695 1961 49.8963573062009 1962 49.8813582101051 1963 49.8662930696284 1964 49.8500127548339 1965 49.8346305062596 1966 49.8207082452935 1967 49.8038962443466 1968 49.7844153057732 1969 49.7646753420958 1970 49.6179562571504 1971 49.356437950135 1972 49.1220815427777 1973 48.9052238936658 1974 48.6938279933717 1975 47.9107516406998 1976 46.9132196903754 1977 46.5490281194471 1978 46.3469141160167 1979 46.2051175450378 1980 46.2139207566948 1981 46.3034482671933 1982 46.434785025724 1983 46.5614747654811 1984 46.6758079978424 1985 46.7788218419244 1986 46.9385093972747 1987 47.1578992770071 1988 47.3180906868139 1989 47.4767843108704 1990 47.694126054562 1991 47.9050932450854 1992 48.2961119917598 1993 48.7568469915215 1994 48.9723968356447 1995 49.0267528047 1996 49.0709057955333 1997 49.1142029584915 1998 49.1105680423567 1999 49.1102029867033 2000 49.1508222609736 2001 49.1895003741229 2002 49.2252013030957 2003 49.2586319208052 2004 49.29374708204 2005 49.3308878221652 2006 49.3672659271234 2007 49.4023277496536 2008 49.4387074824468 2009 49.4595690511411 2010 49.4647207943005 2011 49.4693624932542 2012 49.4741198811901 2013 49.4777856305363 2014 49.480221871054 2015 49.4835130130826 2016 49.4854583008418 2017 49.4883513914018 2018 49.4906783911727 2019 49.4903116077954 2020 49.494397097981 2021 49.5030237766263 2022 49.4966913452548 2023 49.4815408550079