Year % of total population 1960 48.3948388833563 1961 48.3818103116552 1962 48.3697280324833 1963 48.3582488889529 1964 48.3471788899125 1965 48.3371174879275 1966 48.3277058775978 1967 48.3184557585276 1968 48.3089636469422 1969 48.2988040648164 1970 48.2884787025815 1971 48.2773040069191 1972 48.2653172977115 1973 48.2533825196085 1974 48.2413153270252 1975 48.2296050155511 1976 48.2191809218386 1977 48.2117894734361 1978 48.2085687291848 1979 48.2088562990395 1980 48.211735519356 1981 48.2163354438642 1982 48.2229388908613 1983 48.2316270357049 1984 48.2411845330946 1985 48.2511350925798 1986 48.2613673725334 1987 48.2711557283485 1988 48.2812716367717 1989 48.2928706390263 1990 48.3045620318493 1991 48.3134312345206 1992 48.3186968031079 1993 48.3202561975794 1994 48.317458365335 1995 48.3103544388753 1996 48.3007351616066 1997 48.2903920278249 1998 48.2798579162255 1999 48.27060710561 2000 48.2629145397819 2001 48.257054070875 2002 48.2538353985616 2003 48.2523344191396 2004 48.2523371935461 2005 48.2541457104254 2006 48.2578509338013 2007 48.2633843198966 2008 48.2701569643795 2009 48.2778987901149 2010 48.2863948406435 2011 48.2956875525486 2012 48.3055280393691 2013 48.3149011535313 2014 48.3227262533084 2015 48.3286325251693 2016 48.3337334918011 2017 48.3392319638769 2018 48.3456886553348 2019 48.353782544227 2020 48.3669367857184 2021 48.3857564167239 2022 48.4057056730639 2023 48.4224230648962