Year % of total population 1960 49.481735148352456 1961 49.469469998002914 1962 49.447432402023026 1963 49.42420858344766 1964 49.39668487621175 1965 49.365593580967484 1966 49.3493606021021 1967 49.34827087229678 1968 49.34773719035503 1969 49.349123183165226 1970 49.35242092989867 1971 49.35712172504757 1972 49.36530441015386 1973 49.37941875964902 1974 49.39284612300179 1975 49.39948838033663 1976 49.40874836928068 1977 49.41316656897055 1978 49.40764958036263 1979 49.40367233168001 1980 49.40449097514267 1981 49.366026186024364 1982 49.3426571878107 1983 49.36741641109463 1984 49.38519624963939 1985 49.40080285681565 1986 49.42169995286093 1987 49.444274868813366 1988 49.46204026982335 1989 49.47242360847011 1990 49.4740192904414 1991 49.47359915125676 1992 49.47093813127216 1993 49.465636334691126 1994 49.46189609431722 1995 49.4609585803512 1996 49.4537557056905 1997 49.43987025485105 1998 49.43495355504907 1999 49.43874494148871 2000 49.44626758129493 2001 49.45669356241316 2002 49.46426290766716 2003 49.4624528881202 2004 49.4559137118133 2005 49.45250348933631 2006 49.44906065080488 2007 49.44816318432172 2008 49.45027297057783 2009 49.45098252167032 2010 49.450086275717176 2011 49.44698643583132 2012 49.449021313603254 2013 49.451800734952045 2014 49.44953114814466 2015 49.453262483835594 2016 49.4642263620721 2017 49.47738193901966 2018 49.491175047531044 2019 49.50458516542572 2020 49.51689990577679 2021 49.52948294621881 2022 49.54337060595681 2023 49.557331841022005