Year % of total population 1960 51.3553615465782 1961 51.0503046524564 1962 50.8427184220558 1963 50.7544476976244 1964 50.7947571179795 1965 50.8719873830219 1966 50.9103387102744 1967 50.9246673633236 1968 50.9148578282388 1969 50.8668017818171 1970 50.7641235459675 1971 50.6007697474982 1972 50.3384000597121 1973 50.0403840859652 1974 49.8268040847426 1975 49.6681686467406 1976 49.5295356409638 1977 49.4293450634951 1978 49.3691327888967 1979 49.245176059875 1980 49.0523543088519 1981 48.9237244727277 1982 48.8852311216125 1983 48.9032293113506 1984 48.9762223409728 1985 49.0205510171445 1986 49.0134005354816 1987 49.0102456358422 1988 48.985452586501 1989 48.9350131442539 1990 48.8551672492115 1991 48.7708862933175 1992 48.6997091501041 1993 48.6055870849642 1994 48.4564004068269 1995 48.062362677786 1996 47.7002090277346 1997 47.4695312666057 1998 47.3103360453499 1999 47.2983522039685 2000 47.2871988833796 2001 47.2865699577904 2002 47.3494447005385 2003 47.4556461606057 2004 47.5218570664162 2005 47.5971153902064 2006 47.7104661863347 2007 47.8682941653663 2008 48.0695225694564 2009 48.2892251242498 2010 48.5207500353723 2011 48.7528163514502 2012 48.9868175791093 2013 49.2343573389368 2014 49.5457375625987 2015 49.9445411784118 2016 50.4712568156863 2017 51.0694160814323 2018 51.6174541998215 2019 52.1539029473972 2020 52.6650768317732 2021 53.1311945550048 2022 53.5245505330893 2023 53.853456278984