Year % of total population 1960 49.43923109465313 1961 49.45351960171961 1962 49.464525572153654 1963 49.473369068777835 1964 49.48248233477997 1965 49.49129316746543 1966 49.49947830767862 1967 49.50866162503308 1968 49.51832373846684 1969 49.52660991478597 1970 49.53280580928563 1971 49.57044503906919 1972 49.60745390153863 1973 49.61165828968495 1974 49.613398247343135 1975 49.62414467312201 1976 49.641307313337926 1977 49.65491069020514 1978 49.67344476521944 1979 49.69313676038414 1980 49.69510956642184 1981 49.69301561001994 1982 49.70011247740367 1983 49.70762056000814 1984 49.716333352869746 1985 49.72301431697436 1986 49.72756992503297 1987 49.732717383176194 1988 49.74173942633429 1989 49.747243217194494 1990 49.745405891090556 1991 49.74246564545873 1992 49.74133914882164 1993 49.74128699091275 1994 49.74225032127632 1995 49.747707787260985 1996 49.75753310347043 1997 49.76810720784656 1998 49.77929016264943 1999 49.790773323905356 2000 49.798538219472505 2001 49.80542410336217 2002 49.81356364622835 2003 49.82262459996809 2004 49.83288539219323 2005 49.845156588703524 2006 49.86119298129537 2007 49.87800985886717 2008 49.896209045052856 2009 49.91442525432873 2010 49.92744799532553 2011 49.937964084518455 2012 49.94819486236031 2013 49.95834251418104 2014 49.96788105322036 2015 49.98534087039983 2016 50.00930165418218 2017 50.02831554051339 2018 50.0442791020605 2019 50.05921641676395 2020 50.06810766731165 2021 50.07219784662431 2022 50.077390677672646 2023 50.08233522536273