Year % of total population 1960 50.2554794413885 1961 50.2772218477912 1962 50.2290823663319 1963 50.1327622263772 1964 49.9906008830089 1965 49.8514640657297 1966 49.7200964277887 1967 49.6009627123374 1968 49.4936372595227 1969 49.3854187929509 1970 49.2800800455665 1971 49.1761998718253 1972 49.073579998322 1973 48.9841728240742 1974 48.9037422864254 1975 48.8407983202832 1976 48.7898992319719 1977 48.7457607140752 1978 48.7077126829219 1979 48.7499969571494 1980 48.7940519229983 1981 48.7668603254367 1982 48.7436963534934 1983 48.7252319479501 1984 48.7097866194243 1985 48.6971273919883 1986 48.6866085708472 1987 48.6787059137793 1988 48.6748738177037 1989 48.6737651045303 1990 48.6735671782988 1991 48.6747577113787 1992 48.6796414912836 1993 48.6896280237443 1994 48.703351728176 1995 48.7187864184558 1996 48.7362835830841 1997 48.7551647693693 1998 48.7529886299048 1999 48.7373950868398 2000 48.7427783586776 2001 48.7631424072277 2002 48.7859324029811 2003 48.8126428473161 2004 48.8424353512115 2005 48.8737150407367 2006 48.9062585081158 2007 48.9412452467027 2008 48.9764053557068 2009 49.0091645080265 2010 49.0404665586197 2011 49.0720731974864 2012 49.1053217217467 2013 49.1383022147509 2014 49.1709731321298 2015 49.2023954130958 2016 49.2320740976544 2017 49.2613146110332 2018 49.2889963661488 2019 49.3157171153697 2020 49.3398246278948 2021 49.3621407264739 2022 49.3862457885433 2023 49.4104634371097