Year % of total population 1960 43.17759205772408 1961 43.29288901141391 1962 43.40776305433221 1963 43.55046195333183 1964 43.719749593880486 1965 43.87537023033187 1966 44.00737753508039 1967 44.135247958338006 1968 44.26093755678081 1969 44.388942492984015 1970 44.52461618309529 1971 44.67157199777915 1972 44.83100843663943 1973 44.96940892199391 1974 45.06808329464227 1975 45.15543335763656 1976 45.24282985227121 1977 45.32626236615173 1978 45.39443695925673 1979 45.46509168879049 1980 45.56065407263324 1981 45.66132191401902 1982 45.743655073172505 1983 45.80474544448893 1984 45.864409753493874 1985 45.932628164432984 1986 45.99653339749803 1987 46.04687508127957 1988 46.082662805311 1989 46.11535799468572 1990 46.144441396975566 1991 46.14863475522655 1992 46.134388883950606 1993 46.13556198483171 1994 46.068285796675774 1995 45.979737665973296 1996 45.98279724022617 1997 45.999043769555314 1998 45.95802944752685 1999 45.88331076072865 2000 45.80427296461573 2001 45.71311942885713 2002 45.617027339907025 2003 45.50855613770905 2004 45.38860417919294 2005 45.26415825164666 2006 45.144636057729755 2007 45.0587639863625 2008 44.95817665380183 2009 44.82485064621931 2010 44.70091547427203 2011 44.56096386490441 2012 44.41375537840809 2013 44.2652868696296 2014 44.07952817416471 2015 43.88306551652627 2016 43.67188690754896 2017 43.43261232233774 2018 43.19241006081517 2019 42.952575068360495 2020 42.70414300780287 2021 42.457600224079556 2022 42.213791450289555 2023 41.95375547096755