Year % of total population 1960 55.5911473384378 1961 55.3744458770943 1962 55.0799415031606 1963 54.6905943995307 1964 54.1402101601549 1965 53.6485829047939 1966 53.3185148900433 1967 53.0000116044405 1968 52.6984964071118 1969 52.412529388761 1970 52.1457490681981 1971 51.8978312419729 1972 51.6708708126453 1973 51.4728435252191 1974 51.306835401397 1975 51.1720917760454 1976 51.0769711381532 1977 51.0167902925006 1978 50.9804843484623 1979 50.9534160978964 1980 50.9164661874467 1981 50.8685881180819 1982 50.816825587213 1983 50.7730803100496 1984 50.7371006369451 1985 50.7052185379876 1986 50.6818534108819 1987 50.6667502703791 1988 50.6554679487199 1989 50.659670902548 1990 50.6781688112573 1991 50.700461577366 1992 50.7329128019601 1993 51.2574304300398 1994 51.457281079057 1995 51.0835629905877 1996 50.996339375808 1997 51.0720638995363 1998 51.2100893915008 1999 51.3674049202272 2000 51.5396777061178 2001 51.7208410019328 2002 51.9009300998159 2003 52.0670186830687 2004 52.2109355386004 2005 52.3975144731177 2006 52.5378717689733 2007 52.6174493384732 2008 52.744940376761 2009 52.9338765286226 2010 53.1325836349297 2011 53.2835570230879 2012 53.4127977926277 2013 53.5268527972479 2014 53.6482825371715 2015 53.748416402831 2016 53.8121450154304 2017 53.8767727606421 2018 53.9622543382881 2019 54.0725135723331 2020 54.1984761201801 2021 54.3456110093988 2022 54.5044156819091 2023 54.6619778210592