Year % of total population 1960 49.481735148352456 1961 49.469469998002914 1962 49.447432402023026 1963 49.424208583447665 1964 49.396684876211765 1965 49.36559358096747 1966 49.34936060210211 1967 49.34827087229678 1968 49.34773719035503 1969 49.349123183165226 1970 49.35242092989867 1971 49.35712172504757 1972 49.36530441015385 1973 49.37941875964902 1974 49.39284612300179 1975 49.399488380336635 1976 49.40874836928069 1977 49.41316656897055 1978 49.40764958036263 1979 49.40367233168001 1980 49.40449097514267 1981 49.366026186024364 1982 49.3426571878107 1983 49.367416411094645 1984 49.38519624963941 1985 49.40080285681565 1986 49.42169995286093 1987 49.444274868813366 1988 49.46204026982335 1989 49.472423608470116 1990 49.47678135405373 1991 49.47614460733566 1992 49.47329891315883 1993 49.4678580740578 1994 49.46395607457951 1995 49.46281811661511 1996 49.45548433422028 1997 49.44153383907901 1998 49.436638641018995 1999 49.44057150986234 2000 49.44820947977789 2001 49.45898864913544 2002 49.46726210143005 2003 49.466342717399726 2004 49.46071802165216 2005 49.458026132759734 2006 49.45514113864363 2007 49.45467850394671 2008 49.45710588931222 2009 49.458108596879725 2010 49.45751468724615 2011 49.454729693113634 2012 49.45701710221484 2013 49.459989889156134 2014 49.458013333547434 2015 49.46191851456633 2016 49.47285783088147 2017 49.48576159297911 2018 49.49917432026258 2019 49.51221411723403 2020 49.52417977988697 2021 49.53646230380909 2022 49.55006213632174 2023 49.5637204911033