Year % of total population 1960 52.9492371828898 1961 52.8914776054296 1962 52.8698785438321 1963 52.8653658472437 1964 52.8775048737961 1965 52.8968876480642 1966 52.9126256333948 1967 52.9292656180642 1968 52.9482738587395 1969 52.9634846366934 1970 52.9760845363649 1971 52.9851744488225 1972 52.9800053625464 1973 52.9664194743996 1974 52.958552496549 1975 52.9536633527312 1976 52.9506060745064 1977 52.9484448027332 1978 52.9463962684999 1979 52.9444078080096 1980 52.9424875386017 1981 52.9623647041264 1982 53.0008370259738 1983 53.0340889863022 1984 53.0621298487316 1985 53.0853680220236 1986 53.1037924265012 1987 53.1186334190937 1988 53.132375869342 1989 53.1306985551971 1990 53.0655849511976 1991 52.9581971413144 1992 52.8570986529177 1993 52.760772935333 1994 52.6699723745612 1995 52.5841021618611 1996 52.5028860850478 1997 52.4265695032234 1998 52.3559161046223 1999 52.2898349077346 2000 52.2280116703947 2001 52.1913616048044 2002 52.1760188548477 2003 52.1602927607708 2004 52.143801704897 2005 52.1278023172829 2006 52.1151000332875 2007 52.1053693173855 2008 52.0932509272921 2009 52.0769436694936 2010 52.0604768207484 2011 52.037977428693 2012 52.0072584156695 2013 51.9734278545464 2014 51.9379316512828 2015 51.8991787080056 2016 51.8574824233589 2017 51.816639670268 2018 51.7767334849929 2019 51.7345584787863 2020 51.6887392765271 2021 51.6399470643414 2022 51.5874055803536 2023 51.5332290215685