Year % of total population 1960 55.2402036228683 1961 54.97573706455546 1962 54.711512383909465 1963 54.45311116300844 1964 54.25699038690381 1965 54.13877064297974 1966 54.04867928423297 1967 53.98437452535859 1968 53.954724840653405 1969 53.956645332712554 1970 53.98480556958733 1971 54.028327624507654 1972 54.08746493464375 1973 54.16306470006701 1974 54.25175334661531 1975 54.35883029733698 1976 54.46893784072511 1977 54.59281527200821 1978 54.7371435626217 1979 54.88436757123121 1980 55.037026915335765 1981 55.197354682170726 1982 55.34823789291498 1983 55.49574457801839 1984 55.641649277813805 1985 55.78856129204408 1986 55.94970220291651 1987 56.11758985473427 1988 56.292936672632855 1989 56.479119606795315 1990 56.680922595312836 1991 56.89836313344576 1992 57.101693242831196 1993 57.31144079126096 1994 57.560956487033245 1995 57.8548992938979 1996 58.17638631527775 1997 58.523696445362376 1998 58.89761687288945 1999 59.283669509592855 2000 59.668878695342116 2001 60.04482569671774 2002 60.400541426008935 2003 60.75153555372852 2004 61.112092403098345 2005 61.47181366853423 2006 61.83262394483869 2007 62.18949258728714 2008 62.52333660015456 2009 62.840922320873524 2010 63.151907491726256 2011 63.437221024734264 2012 63.69626452613764 2013 63.93857876757361 2014 64.16255979333533 2015 64.37719271082875 2016 64.59304373774322 2017 64.80700621073129 2018 65.00468823766106 2019 65.19234046833422 2020 65.39151209366914 2021 65.61033566642462 2022 65.83776863010004 2023 66.04201779611627