Year % of total population 1960 49.9326368530466 1961 49.8940371287152 1962 49.8260770266504 1963 49.7544190787366 1964 49.6874091254697 1965 49.6335480703909 1966 49.6197175843505 1967 49.637868887693 1968 49.6579914651566 1969 49.6793041743055 1970 49.699781998441 1971 49.7079625619387 1972 49.7021633935411 1973 49.6942054886606 1974 49.6811491766918 1975 49.6772870571328 1976 49.7027044967786 1977 49.742604554302 1978 49.78316358239 1979 49.8250910397336 1980 49.8673517541727 1981 49.8990767430623 1982 49.9189892695107 1983 49.936432915092 1984 49.9499869185206 1985 49.9573481819979 1986 49.9411342727931 1987 49.9078168452385 1988 49.8734788212323 1989 49.8358318005398 1990 49.7943258844354 1991 49.7716028075537 1992 49.7696600521447 1993 49.7633035207796 1994 49.7537892625789 1995 49.7466372767964 1996 49.7432006820474 1997 49.7442768047347 1998 49.7466900671843 1999 49.7467801468103 2000 49.7473775177372 2001 49.7733231147956 2002 49.8229124745238 2003 49.8731103650592 2004 49.9258547809707 2005 49.977948226851 2006 50.01992847062 2007 50.0540837307274 2008 50.088915747319 2009 50.1243835440173 2010 50.1517463304172 2011 50.1317432595623 2012 50.074250237009 2013 50.0191174422553 2014 49.9661250733143 2015 49.91989610781 2016 49.916636107312 2017 49.9493405752436 2018 49.9815623615194 2019 50.0143821415209 2020 50.0401101829329 2021 50.058096506359 2022 50.0780688365192 2023 50.1009509509481