Year % of total population 1960 51.815880395937 1961 51.813673128664 1962 51.8159959254097 1963 51.8153506190114 1964 51.8090969714269 1965 51.7988201307037 1966 51.7866909231825 1967 51.7729101379453 1968 51.7536102538249 1969 51.7317506566234 1970 51.7103586679844 1971 51.6875769639514 1972 51.6628517432672 1973 51.634519485557 1974 51.6008241986725 1975 51.5686621668578 1976 51.5450994497103 1977 51.5270919106326 1978 51.5102060490875 1979 51.4923687292052 1980 51.4740874520074 1981 51.456703800723 1982 51.4401754509314 1983 51.4239584308837 1984 51.4067307789261 1985 51.3880644893075 1986 51.3706192265588 1987 51.3387005027608 1988 51.3176971531327 1989 51.3210341916719 1990 51.3242760621049 1991 51.327995570195 1992 51.331659980505 1993 51.3360864474854 1994 51.3418791667699 1995 51.3229846167477 1996 51.2796628843838 1997 51.2385806927597 1998 51.2091733709414 1999 51.2496405125007 2000 51.3366134767641 2001 51.4058053619076 2002 51.4676569167393 2003 51.5252153691709 2004 51.5784352731558 2005 51.627310505903 2006 51.6699601556817 2007 51.6980484478376 2008 51.6865171432967 2009 51.6466404623786 2010 51.607719903669 2011 51.5728015421006 2012 51.5426906350459 2013 51.5167046027167 2014 51.4965196553992 2015 51.4776896927801 2016 51.4577587106328 2017 51.4395229349404 2018 51.4224039863494 2019 51.4062742399736 2020 51.3922260966201 2021 51.3779515088733 2022 51.3613976200419 2023 51.3442616434717