Year % of total population 1960 51.6091171228609 1961 51.6577849171745 1962 51.7090868806603 1963 51.7569758096161 1964 51.7904742280025 1965 51.8035522524123 1966 51.8042626378613 1967 51.8396730772048 1968 51.928168555069 1969 52.0365536458599 1970 52.1454619353528 1971 52.2519690578198 1972 52.3528807816698 1973 52.4445147170188 1974 52.5253525910591 1975 52.5926580117166 1976 52.6419859284394 1977 52.6412060598014 1978 52.5928358763093 1979 52.5395835887624 1980 52.4901263691101 1981 52.5002839940929 1982 52.5081213481517 1983 52.4581810970168 1984 52.4071205944754 1985 52.307944191344 1986 52.1833869752791 1987 52.0805515976005 1988 51.968445459283 1989 51.8749273565534 1990 51.7968738107589 1991 51.7137006132321 1992 51.6414909772851 1993 51.5906952743245 1994 51.5908473719694 1995 51.5964692792267 1996 51.5720731686023 1997 51.6650281508457 1998 51.7787253347235 1999 51.7984622484951 2000 51.812622271217 2001 51.8273548198764 2002 51.849099122676 2003 51.866882886899 2004 51.8750867921979 2005 51.878837861489 2006 51.8867810732694 2007 51.8988789750629 2008 51.8238872526081 2009 51.6558801555596 2010 51.4905629500327 2011 51.340590625229 2012 51.1979011088278 2013 51.0629793466802 2014 50.938078721694 2015 50.8218276869241 2016 50.7127202579552 2017 50.6118691320925 2018 50.5178261813744 2019 50.427962069505 2020 50.3736485256066 2021 50.3611175647147 2022 50.3885426115323 2023 50.4427570691646