Year % of total population 1960 53.0577576443941 1961 53.0685834652322 1962 53.0692818582594 1963 53.0471748638757 1964 52.9778490962908 1965 52.8844023923294 1966 52.7916021056304 1967 52.7015968063872 1968 52.6240282274481 1969 52.5751937839181 1970 52.5265358346399 1971 52.4608568739043 1972 52.3968692601724 1973 52.3359076420495 1974 52.2782759486162 1975 52.219237048045 1976 52.1464673391482 1977 52.0373857850317 1978 51.8979499111949 1979 51.7547142847421 1980 51.6181131770739 1981 51.4864073275288 1982 51.365099001757 1983 51.2676750962031 1984 51.1964530636981 1985 51.1483888742784 1986 51.1102784449345 1987 51.0740417331607 1988 51.0479483578602 1989 51.047610247407 1990 51.0532313385685 1991 51.0516178736518 1992 51.054428707949 1993 51.0561793041272 1994 51.0539577187807 1995 51.050320228742 1996 51.0456376233549 1997 50.9972603528435 1998 50.9019722122995 1999 50.8055527409059 2000 50.713876237378 2001 50.6259209600552 2002 50.542320062153 2003 50.4650915056352 2004 50.4020549007119 2005 50.4338381356317 2006 50.514788202007 2007 50.5536017195539 2008 50.5897414620847 2009 50.6062822987361 2010 50.5741586529266 2011 50.5172679241315 2012 50.4616609473541 2013 50.4081130559998 2014 50.3497175905811 2015 50.2709940925408 2016 50.1804418004708 2017 50.0912610911239 2018 50.0014040999719 2019 49.9120452458878 2020 49.8406092114957 2021 49.778318276581 2022 49.7313329884463 2023 49.7076702014738