Year % of total population 1960 50.12573445960758 1961 50.10974329287658 1962 50.09470553114274 1963 50.08098086537894 1964 50.06792057773706 1965 50.05500673802538 1966 50.0427688437165 1967 50.03135945521038 1968 50.02010964514463 1969 50.00907014390328 1970 49.99879963582615 1971 49.98123436066071 1972 49.95692103523247 1973 49.933693901317206 1974 49.91077222955828 1975 49.888793568092 1976 49.866851078302815 1977 49.84761400002159 1978 49.83116277653845 1979 49.81387121084997 1980 49.79729719416382 1981 49.78073320295169 1982 49.76290807966769 1983 49.74617691293354 1984 49.73094022008734 1985 49.717005472285386 1986 49.704016097750575 1987 49.690952535565565 1988 49.67832227877196 1989 49.66546915722674 1990 49.6519978201172 1991 49.63769008574072 1992 49.62309370268194 1993 49.60924543851896 1994 49.59773568662128 1995 49.587344629855124 1996 49.576051967329356 1997 49.56468528231507 1998 49.553638241703425 1999 49.542616028223236 2000 49.52934273011874 2001 49.51604774183148 2002 49.503927450399374 2003 49.49211641739542 2004 49.48114682500134 2005 49.470649438286834 2006 49.46066701857604 2007 49.45080165289574 2008 49.43810298920984 2009 49.423106031687006 2010 49.409671195875724 2011 49.39850572442544 2012 49.38815862910618 2013 49.377828742892866 2014 49.368865096089856 2015 49.36018569543281 2016 49.350461787912685 2017 49.34033312024599 2018 49.33072609074644 2019 49.318568558496935 2020 49.297234878520264 2021 49.268399335488006 2022 49.24576509010296 2023 49.2325695504233