Year % of total population 1960 50.7995050682911 1961 50.9361374711464 1962 50.9766425351728 1963 51.0189098998888 1964 51.0718323332464 1965 51.1258869014743 1966 51.1665593252031 1967 51.2046721745147 1968 51.2323522373774 1969 51.2554755944931 1970 51.2601164958957 1971 51.1581872513752 1972 50.9792768708644 1973 50.8134152102031 1974 50.6553425483033 1975 50.4957187922488 1976 50.3288179416559 1977 50.1534603436015 1978 49.9850361004078 1979 49.833507931757 1980 49.7246336227014 1981 49.667019125531 1982 49.6282527881041 1983 49.5918926321556 1984 49.5588528362049 1985 49.5441549333765 1986 49.5169211536744 1987 49.4757570919155 1988 49.4254494183997 1989 49.3722750433367 1990 49.3231251087524 1991 49.2604623837993 1992 49.1889852885704 1993 49.1240913192257 1994 49.0703929894605 1995 49.0204321870008 1996 48.9672459893048 1997 48.8999950188454 1998 48.8358662112437 1999 48.7725685049442 2000 48.7217089504815 2001 48.6909638456681 2002 48.6795732148892 2003 48.6889287315105 2004 48.7009882052917 2005 48.693594243873 2006 48.6770976997828 2007 48.6477927671164 2008 48.6262607101078 2009 48.6338452796237 2010 48.6342931895913 2011 48.6329938771977 2012 48.6327879169289 2013 48.623752086417 2014 48.6181043327283 2015 48.625364246801 2016 48.5919959408892 2017 48.5231133939155 2018 48.4607761400639 2019 48.3890177396101 2020 48.318783089441 2021 48.2386850510244 2022 48.1880219369313 2023 48.1730634160046