Year % of total population 1960 46.58424708239523 1961 46.673789658460294 1962 46.75821284488178 1963 46.83908584325692 1964 46.91252822735356 1965 46.97630691149346 1966 47.033978492528085 1967 47.08330355745443 1968 47.12705487224479 1969 47.16665632089016 1970 47.171151408469555 1971 47.187493306008314 1972 47.25010358533854 1973 47.313565462480035 1974 47.37583518931483 1975 47.43406793958881 1976 47.4743240449924 1977 47.506562944606934 1978 47.54167673211813 1979 47.57154215716198 1980 47.60451582466758 1981 47.64301134896913 1982 47.68339228064221 1983 47.72517802562498 1984 47.764953641830715 1985 47.80267953677355 1986 47.841217779019175 1987 47.881374015877334 1988 47.91937337084495 1989 47.956668958971946 1990 47.98945600301753 1991 48.00868141438021 1992 48.01656680183859 1993 48.01274802262984 1994 48.000018426505825 1995 47.981149674430306 1996 47.96287031715614 1997 47.9484551250581 1998 47.93671458598509 1999 47.92494696729412 2000 47.916479441021295 2001 47.90533375771893 2002 47.888656121160125 2003 47.87114092956134 2004 47.850761117879806 2005 47.82868621280565 2006 47.811715324658245 2007 47.80489318047391 2008 47.808599061394204 2009 47.81909803554041 2010 47.83818009874647 2011 47.86191416851158 2012 47.88651871234478 2013 47.91259545483793 2014 47.93746936905866 2015 47.95864328011628 2016 47.97770029209947 2017 47.99602743252002 2018 48.01414721271934 2019 48.02871233247547 2020 48.03338816640188 2021 48.033234236714705 2022 48.03854954158518 2023 48.03081759539739