Year % of total population 1960 51.0958660946103 1961 51.0285404265488 1962 50.9049659678181 1963 50.7908048024032 1964 50.6915806165946 1965 50.6138497431073 1966 50.5462217166649 1967 50.486018715509 1968 50.4350740318403 1969 50.3914976155796 1970 50.3677863959572 1971 50.3748743170793 1972 50.423623270924 1973 50.5024733473423 1974 50.5832646850813 1975 50.6605396768996 1976 50.7348982604417 1977 50.8289272765431 1978 50.9427315268936 1979 51.0424750742372 1980 51.0773431700306 1981 51.0644702777445 1982 51.0556236450085 1983 51.0467529939175 1984 51.0810324263455 1985 51.1569853940023 1986 51.2296281653383 1987 51.3018989196357 1988 51.3314890468089 1989 51.3151452320837 1990 51.297854189651 1991 51.2808366531661 1992 51.2642759245013 1993 51.2453247703441 1994 51.222510913893 1995 51.2002503393753 1996 51.1792896232874 1997 51.1867889815857 1998 51.2202158044034 1999 51.2534539231497 2000 51.2850574654424 2001 51.3070562100853 2002 51.3189767972585 2003 51.3248462976072 2004 51.3234896946144 2005 51.3206248799547 2006 51.3187125644689 2007 51.3127573569303 2008 51.3117143973943 2009 51.3142419593647 2010 51.3029561809336 2011 51.2738473783777 2012 51.2336095178905 2013 51.1873542451407 2014 51.1390812691753 2015 51.0926212127997 2016 51.0363243461907 2017 50.9880574842189 2018 50.9687846041232 2019 50.9608875110428 2020 50.948804388856 2021 50.939340722869 2022 50.9358432234284 2023 50.9263407403422