Year % of total population 1960 49.3952280308625 1961 49.3567329043833 1962 49.3184347760839 1963 49.2870101484183 1964 49.2638565033414 1965 49.2255771784811 1966 49.1780986401705 1967 49.1387531290976 1968 49.1102104757214 1969 49.0816751852761 1970 49.0340128837574 1971 49.0687806860816 1972 49.1945480656151 1973 49.2181817140435 1974 49.1654500593363 1975 49.1268598055793 1976 49.0813146795771 1977 49.0251683800071 1978 48.9712492626063 1979 48.9091620468848 1980 48.8413459027165 1981 48.7802937391796 1982 48.704728508027 1983 48.6430056917688 1984 48.6386588623185 1985 48.6492607772617 1986 48.6655621044626 1987 48.709132422556 1988 48.7770196448082 1989 48.8742508933569 1990 48.9950612038283 1991 49.1051995476179 1992 49.1650405092001 1993 49.1919525481665 1994 49.1892658247998 1995 49.173402676414 1996 49.1788519900678 1997 49.2087923118656 1998 49.2735625888275 1999 49.3416777493368 2000 49.3280964492641 2001 49.2981303116147 2002 49.3138796132878 2003 49.3731043024165 2004 49.4604489414314 2005 49.5090995138321 2006 49.5381072133174 2007 49.5596705760751 2008 49.6028733103441 2009 49.6770228253272 2010 49.7428362947917 2011 49.8367444606971 2012 49.9450606406137 2013 50.0272526727875 2014 50.0810151258207 2015 50.1489266044734 2016 50.2105936220217 2017 50.2432569769723 2018 50.275944090684 2019 50.2975129562094 2020 50.3176559607487 2021 50.3294901935022 2022 50.330374197613 2023 50.3318732741979