Year % of total population 1960 52.1530275779376 1961 52.0501825918168 1962 51.9438017589579 1963 51.8364694188221 1964 51.7322791970679 1965 51.6125944750652 1966 51.4805740962228 1967 51.3537550025992 1968 51.223067212285 1969 51.0500390442908 1970 50.7946977718376 1971 50.3126683571725 1972 49.700758481717 1973 49.1927886262419 1974 48.7679217298535 1975 48.4789212192891 1976 48.4083564654317 1977 48.4651451652665 1978 48.557469763008 1979 48.6880246960057 1980 48.8502918670935 1981 49.0385688942922 1982 49.2525474525474 1983 49.4884038857748 1984 49.7565436476461 1985 50.074235768471 1986 50.4085995236059 1987 50.7228667234549 1988 51.0153785650496 1989 51.2885479535668 1990 51.5432465323032 1991 51.7907486843189 1992 52.0463602251134 1993 52.3016333625636 1994 52.5451674807856 1995 52.7747348669604 1996 52.9992048053586 1997 53.2302647402906 1998 53.4624949466489 1999 53.692428610105 2000 53.8945551928759 2001 54.064987113841 2002 54.2280213106517 2003 54.3861722206382 2004 54.5425352650042 2005 54.695680289169 2006 54.8349865583635 2007 54.9613668926457 2008 55.0905909097075 2009 55.2321896961826 2010 55.3823278777409 2011 55.5279644441876 2012 55.6580436362035 2013 55.7785924634894 2014 55.9057075491044 2015 56.0469101948879 2016 56.2023365631697 2017 56.3718666198492 2018 56.5564756260533 2019 56.7522922459937 2020 56.9651926639617 2021 57.2053299352547 2022 57.4241048776531 2023 57.6132340299382