Year % of total population 1960 52.2769455824592 1961 52.2311304714279 1962 52.156970972645 1963 52.0842530112884 1964 52.021260983803 1965 51.9652694420376 1966 51.9171931341436 1967 51.8774428914895 1968 51.8437744006339 1969 51.8167158802957 1970 51.7938099225297 1971 51.7470111263413 1972 51.6658198848993 1973 51.57552333178 1974 51.4892594011872 1975 51.407079471963 1976 51.3307991516565 1977 51.2630248894831 1978 51.2027003389279 1979 51.1488213502658 1980 51.1027889581962 1981 51.0578020475977 1982 51.0097693678723 1983 50.9704169656116 1984 50.9432206586344 1985 50.9205751692793 1986 50.8993152071412 1987 50.8852983983589 1988 50.8850385907106 1989 50.8984235911048 1990 50.9260719423534 1991 50.975271780003 1992 51.0370978149172 1993 51.1007792818408 1994 51.1461754003373 1995 51.1859520999389 1996 51.2345893548856 1997 51.2846291155243 1998 51.3471303969219 1999 51.4044779817049 2000 51.4455476185965 2001 51.4844447252652 2002 51.5263055582335 2003 51.5585489704294 2004 51.5465302863828 2005 51.5003752715781 2006 51.4527820155088 2007 51.4040476450454 2008 51.3617518599576 2009 51.3248159801769 2010 51.2959476676745 2011 51.2841332852159 2012 51.2650639521934 2013 51.2445855009733 2014 51.240749557776 2015 51.2365016420439 2016 51.2306084034463 2017 51.2318994114838 2018 51.2332628611698 2019 51.2396969523918 2020 51.2571377700907 2021 51.2810997373614 2022 51.306368226165 2023 51.3166316831209