Year % of total population 1960 50.11604825998852 1961 50.10106783190457 1962 50.087481578435224 1963 50.0756232568811 1964 50.06453991798166 1965 50.05343593785182 1966 50.04305269700951 1967 50.03344079724258 1968 50.02356443499097 1969 50.013603060841035 1970 50.00410619087718 1971 49.9862860140081 1972 49.96137653114905 1973 49.937904684899266 1974 49.91434827882501 1975 49.89155781307847 1976 49.86855803297594 1977 49.84835570867339 1978 49.831392201126576 1979 49.81339704607649 1980 49.79604294432267 1981 49.77857726356974 1982 49.759706016240656 1983 49.74217653110946 1984 49.72633627013998 1985 49.71171585222643 1986 49.69786597602018 1987 49.68369705410528 1988 49.66994263362648 1989 49.65618234403279 1990 49.6416453757001 1991 49.62594086981212 1992 49.60981734041296 1993 49.594582561698545 1994 49.58234048767643 1995 49.57152975131045 1996 49.55968085024948 1997 49.547696576903725 1998 49.536066309227216 1999 49.52451839373292 2000 49.51076388826719 2001 49.49753201447528 2002 49.48565510437353 2003 49.47408138624929 2004 49.463560511593435 2005 49.45340516878384 2006 49.443712341984074 2007 49.43424563606038 2008 49.42196914676192 2009 49.40727916433916 2010 49.39409883397745 2011 49.38313320204201 2012 49.372877185212076 2013 49.36273028487483 2014 49.35425292912839 2015 49.34618508702814 2016 49.3373908463034 2017 49.32840343672149 2018 49.31893420504388 2019 49.30811605729483 2020 49.2884555881959 2021 49.25927759846102 2022 49.236256524755646 2023 49.223123126103076