Year % of total population 1960 49.148119475133846 1961 49.18366244316372 1962 49.210395696181415 1963 49.22849295523387 1964 49.24508898186444 1965 49.26593336474954 1966 49.28447263229625 1967 49.296628590282715 1968 49.30619441560273 1969 49.31324914996168 1970 49.316745338221594 1971 49.31555541743228 1972 49.31340803486177 1973 49.31219538497647 1974 49.312774186140665 1975 49.320219714930055 1976 49.33131517547966 1977 49.34041964781369 1978 49.349036049191184 1979 49.3601597811209 1980 49.36936506251399 1981 49.373106752446056 1982 49.37437625409296 1983 49.37534147021087 1984 49.37582316950736 1985 49.373799646116275 1986 49.36914822197909 1987 49.36142958231383 1988 49.35206258685074 1989 49.34063885952253 1990 49.326637245833936 1991 49.31133062676787 1992 49.295999177589934 1993 49.28300081193205 1994 49.271370722724704 1995 49.25981979745018 1996 49.248571213137055 1997 49.2378494831477 1998 49.229349154791905 1999 49.220994677104244 2000 49.20897373299978 2001 49.19834665455399 2002 49.19109611517989 2003 49.18454458709382 2004 49.17809522609404 2005 49.17142557194829 2006 49.16513240508656 2007 49.15975929059733 2008 49.15532008879449 2009 49.15251005957725 2010 49.15186272956452 2011 49.15177686354009 2012 49.15173190760987 2013 49.15327693477322 2014 49.15663500208597 2015 49.161819083069936 2016 49.16925316784935 2017 49.180516551109484 2018 49.195341766925495 2019 49.21115907028241 2020 49.23134889727942 2021 49.25654395019854 2022 49.28010724015046 2023 49.300679910145796