Year % of total population 1960 49.4546224716721 1961 49.2364917776038 1962 49.0466678772471 1963 48.8470309992398 1964 48.6603624901497 1965 48.4922214849222 1966 48.3019386772996 1967 48.0342966020959 1968 47.7545523742608 1969 47.5201907962491 1970 47.3212487411883 1971 47.1625551074008 1972 47.0173440784863 1973 46.8864018365925 1974 46.7830634926739 1975 46.7004341534009 1976 46.6375366969345 1977 46.60570616175 1978 46.5800945539387 1979 46.5497041766739 1980 46.4996770660751 1981 46.4568632222132 1982 46.520545105964 1983 46.6684804115552 1984 46.8078044617245 1985 46.9515396379739 1986 47.0167744764829 1987 47.0179489870893 1988 47.0193740685544 1989 47.0148531148938 1990 47.0029307995296 1991 47.0541544900242 1992 47.1588429376953 1993 47.2378118872135 1994 47.3073709389387 1995 47.3652428171879 1996 47.4753301011739 1997 47.6392195664945 1998 47.8001411345995 1999 47.9658822633463 2000 48.129264565714 2001 48.1701562960779 2002 48.0966562689664 2003 48.0035720567741 2004 47.9014207167275 2005 47.7876882218826 2006 47.8577928472594 2007 48.1437416845768 2008 48.4701860495694 2009 48.8341547960786 2010 49.2344691620409 2011 49.4494593790299 2012 49.465590807317 2013 49.4962657811033 2014 49.5287694949805 2015 49.5595573272378 2016 49.5078577336642 2017 49.3736202716795 2018 49.2487968752083 2019 49.1230368206646 2020 49.014157014157 2021 48.9321051699269 2022 48.9050912006414 2023 48.9274298271901