Year % of total population 1960 44.5169646279112 1961 44.6175978034378 1962 44.711885131744 1963 44.8034681621836 1964 44.8859543913691 1965 44.9570958403128 1966 45.0224758737998 1967 45.0818669775975 1968 45.1394243094851 1969 45.186731836463 1970 45.1714887212498 1971 45.1755288631674 1972 45.2503009587218 1973 45.3200506120425 1974 45.3793878174737 1975 45.430074543403 1976 45.4788167188885 1977 45.5251742240226 1978 45.563399921452 1979 45.6175760811266 1980 45.684667122371 1981 45.7460074555895 1982 45.8063579130957 1983 45.8653686721323 1984 45.918508470425 1985 45.9663738911723 1986 46.0168973196018 1987 46.0684869703652 1988 46.1254552568734 1989 46.1868474102198 1990 46.2348373904874 1991 46.2754391733665 1992 46.3240951257961 1993 46.3560512798981 1994 46.3696981854114 1995 46.3738217218081 1996 46.3637729532922 1997 46.353045453865 1998 46.3456386352766 1999 46.3339920165237 2000 46.3097758980175 2001 46.2748727479232 2002 46.2417368723382 2003 46.2195626682324 2004 46.1943612538633 2005 46.1591755393699 2006 46.1294138917813 2007 46.1067360080744 2008 46.088698165295 2009 46.0895200240782 2010 46.1094297180878 2011 46.1353637811155 2012 46.1747888934879 2013 46.2169030067451 2014 46.2556997169868 2015 46.2886330801419 2016 46.3080933842229 2017 46.3242581155399 2018 46.3368535895621 2019 46.3247233827781 2020 46.3044355655085 2021 46.2822739859038 2022 45.9190767437164 2023 45.5989437804715