Year % of total population 1960 51.01711881039308 1961 51.00975803965557 1962 51.003773892221766 1963 50.99710223782102 1964 50.990164321991955 1965 50.98967960262853 1966 51.00099928064803 1967 51.016306319566006 1968 51.02529766786949 1969 51.02445963925203 1970 51.01096615416483 1971 50.98911842282855 1972 50.97151643348207 1973 50.960407693034014 1974 50.95124089221244 1975 50.946197012078315 1976 50.95249020956399 1977 50.96471948556016 1978 50.97715618831038 1979 50.98930133220187 1980 50.994073018868136 1981 50.994480794653924 1982 50.995388648280525 1983 50.994220231719375 1984 50.99220848674365 1985 50.98904737426708 1986 50.98347627114997 1987 50.97745856480945 1988 50.97203851104084 1989 50.96533468218944 1990 50.957005915271274 1991 50.9487944589432 1992 50.94189723682541 1993 50.93634491940755 1994 50.931623069159855 1995 50.92801779703173 1996 50.92519656279216 1997 50.92235210272698 1998 50.91914904138099 1999 50.91430295077254 2000 50.90735863310103 2001 50.90350536259702 2002 50.90357743983569 2003 50.902712888227754 2004 50.89881823418905 2005 50.8936212182969 2006 50.889277147187464 2007 50.88584412359511 2008 50.88233917383553 2009 50.88077281445369 2010 50.87976192214837 2011 50.869178157115265 2012 50.85020069886551 2013 50.832287424098475 2014 50.81569173920952 2015 50.79857042476008 2016 50.78262189452616 2017 50.7692586619106 2018 50.75758146803744 2019 50.748331185263105 2020 50.74889205152777 2021 50.76072405670162 2022 50.76681453259333 2023 50.76760730193007