Year % of total population 1960 50.1308685566481 1961 50.0803053112271 1962 50.0333288894814 1963 49.9893486196779 1964 49.9475470533786 1965 49.905321975072 1966 49.8671188727669 1967 49.847317014457 1968 49.8362837053368 1969 49.8233065821476 1970 49.8132873394374 1971 49.8048709980487 1972 49.7964377583562 1973 49.7815931565856 1974 49.7598622105926 1975 49.7303918067677 1976 49.6977251480212 1977 49.6639298076149 1978 49.6265482012613 1979 49.5927675773207 1980 49.5833434857825 1981 49.6209902185298 1982 49.6938507951235 1983 49.7687687603366 1984 49.8353679880984 1985 49.8919206708372 1986 49.9388708724888 1987 49.9766936180827 1988 50.0063714558777 1989 50.0333663819402 1990 50.0632076062526 1991 50.1032158579352 1992 50.1320117441886 1993 50.1450407711334 1994 50.1596695094598 1995 50.1761203902762 1996 50.1930048878387 1997 50.2125603673423 1998 50.2346116648804 1999 50.268500103525 2000 50.3064695821953 2001 50.3272532090897 2002 50.3311886120487 2003 50.3360637047691 2004 50.3064592173503 2005 50.2396728099169 2006 50.1809287233444 2007 50.1273304057877 2008 50.0776844011629 2009 50.0336968651799 2010 49.9952745631257 2011 49.9627651398135 2012 49.9356514396986 2013 49.9139968515556 2014 49.8977067275668 2015 49.887019731148 2016 49.8816721877379 2017 49.8620126459961 2018 49.827453617291 2019 49.7935488112305 2020 49.7742400448543 2021 49.7700289061311 2022 49.7644525284007 2023 49.7541883050201