Year % of total population 1960 56.602566148318 1961 56.505466505859 1962 56.3569390226556 1963 56.1442335204758 1964 55.9310552972423 1965 55.7737577754549 1966 55.6511739913362 1967 55.5519911494443 1968 55.477462812411 1969 55.4270160695569 1970 55.4021503106726 1971 55.4022423731336 1972 55.4155973795395 1973 55.4439442914075 1974 55.4743898007654 1975 55.4811535039106 1976 55.4644682917675 1977 55.4269043678542 1978 55.3737501305569 1979 55.3113625891663 1980 55.232613378861 1981 55.1304369564476 1982 55.006223539748 1983 54.8737078150373 1984 54.7423892945216 1985 54.6051589782723 1986 54.4602301737527 1987 54.3112623493301 1988 54.1642353124951 1989 54.0400574219863 1990 53.9583634311749 1991 53.9416477794186 1992 53.9966318705262 1993 54.1065472900677 1994 54.2660284430171 1995 54.4663876519604 1996 54.7031767908075 1997 54.9783216979794 1998 55.2792828489538 1999 55.5965014244834 2000 55.9303820130668 2001 56.2919865561956 2002 56.6890631700774 2003 57.1090170552453 2004 57.5539256057824 2005 58.0146260376746 2006 58.4513777253632 2007 58.8605425288899 2008 59.2524945177657 2009 59.6203845842577 2010 59.9935537159856 2011 60.3533323046334 2012 60.6867223839172 2013 61.0351843633195 2014 61.3739419211466 2015 61.6928286025512 2016 61.9876741770243 2017 62.2438019417881 2018 62.4778102834971 2019 62.7021672446906 2020 62.9240373592833 2021 63.1520980568014 2022 63.3809223318214 2023 63.6012700810554