Year % of total population 1960 49.9292137449936 1961 49.6385115166479 1962 49.3966541950856 1963 49.2874826408348 1964 49.1960793377393 1965 49.0465033582313 1966 48.9014531388742 1967 48.7590214466953 1968 48.6248321308259 1969 48.4969845932116 1970 48.3713087393427 1971 48.2824685347685 1972 48.2320829832765 1973 48.1780390837562 1974 48.1317619108943 1975 48.0988613569294 1976 48.0564266595589 1977 48.0025406907503 1978 47.9537898950172 1979 47.9277265102671 1980 47.9371705968381 1981 48.0104382670543 1982 48.1576564885211 1983 48.3597210135854 1984 48.603802256053 1985 48.8775843792092 1986 49.1611689040477 1987 49.4540429409986 1988 49.7743844095761 1989 50.1382239149311 1990 50.551557492985 1991 51.0185447737593 1992 51.5340949319326 1993 52.0630014174791 1994 52.5728766972552 1995 53.0779425323015 1996 53.5842738253541 1997 54.0903131167966 1998 54.61037250793 1999 55.1417985615741 2000 55.6823348103903 2001 56.2093838407436 2002 56.7051450240011 2003 57.1616506179777 2004 57.5845552371219 2005 57.9696325636251 2006 58.7868835383928 2007 59.9887586370008 2008 60.3111675274999 2009 60.0973380921313 2010 60.1548915643773 2011 60.1240619913137 2012 59.5600001813712 2013 57.8538930393469 2014 55.796453030236 2015 54.7772365030211 2016 55.044976200485 2017 55.8963783728002 2018 57.3248336317193 2019 59.3093259878851 2020 60.9797413135012 2021 62.353384276307 2022 63.9047263130174 2023 65.6090159847713