Year % of total population 1960 66.39748399692729 1961 65.91043469200908 1962 65.47888043823995 1963 65.10201314170557 1964 64.71788174425181 1965 64.50047869613869 1966 64.3014103956459 1967 64.08866669275339 1968 63.88090188397825 1969 63.68417090216674 1970 63.49421589326627 1971 63.292871052999914 1972 63.07982572031611 1973 62.84657159830424 1974 62.58218621657815 1975 62.35058668355174 1976 62.09000568820414 1977 61.82381999663746 1978 61.48816695139939 1979 61.08445882254713 1980 60.669862294852884 1981 60.24484054121585 1982 59.86635711377473 1983 59.52352197616218 1984 59.16815739928488 1985 58.81017128972863 1986 58.44606733496598 1987 58.07913526904914 1988 57.71220753810704 1989 57.355541173353764 1990 56.99609062733009 1991 56.62797222346822 1992 56.263313368749145 1993 55.90472167965522 1994 55.543149323175044 1995 55.18277724343898 1996 54.82537955949535 1997 54.462795016570055 1998 54.09387931969507 1999 53.72253034035454 2000 53.342142284801774 2001 52.89695512348029 2002 52.40738180026648 2003 51.91603840351235 2004 51.41709769806145 2005 50.91195995326966 2006 50.41173906082745 2007 49.918171077410065 2008 49.41167295077269 2009 48.9130668258518 2010 48.423787984568044 2011 47.97818644986937 2012 47.538719539776 2013 47.09113253347411 2014 46.63542811223764 2015 46.172750031325066 2016 45.71393365021227 2017 45.26113198386732 2018 44.81237836563852 2019 44.369387502767175 2020 43.935268558547165 2021 43.521868792824975 2022 43.09804517701738 2023 42.66283844831509