Year % of total population 1960 50.570315263446 1961 50.5795297817818 1962 50.5795238385465 1963 50.5740047860448 1964 50.5664848008572 1965 50.5547277180316 1966 50.5415961382684 1967 50.5237948751099 1968 50.5012160156712 1969 50.4788409765935 1970 50.4540813814862 1971 50.4256258636201 1972 50.3962049296133 1973 50.3671080732136 1974 50.3509160158554 1975 50.3462498607718 1976 50.3278429767232 1977 50.2966567447757 1978 50.2656339961592 1979 50.2351851278126 1980 50.2326788355314 1981 50.2787252101689 1982 50.3413884822738 1983 50.3989435669725 1984 50.4536050910215 1985 50.5039528100295 1986 50.550497172413 1987 50.5921278918888 1988 50.6460573652883 1989 50.6821750668909 1990 50.6860736553368 1991 50.6752910870766 1992 50.6358837122797 1993 50.5848883939515 1994 50.5379746507235 1995 50.4916019765851 1996 50.4445423731195 1997 50.3975545849964 1998 50.3522937613605 1999 50.3120936575674 2000 50.2786203079331 2001 50.2471970937395 2002 50.2171729388567 2003 50.2012850724984 2004 50.2035755262546 2005 50.2139227011246 2006 50.2364921795277 2007 50.2685524003497 2008 50.2839667947379 2009 50.2712400260952 2010 50.2454591614392 2011 50.2153078283471 2012 50.1810763364894 2013 50.1471824991968 2014 50.1131645560251 2015 50.0758505266181 2016 50.052156519017 2017 50.039842344856 2018 50.0149763369442 2019 49.9832978535023 2020 49.9551518970423 2021 49.9296818879545 2022 49.9049130618619 2023 49.8808515014759