Year % of total population 1960 48.8740520169358 1961 48.8701389044723 1962 48.8614718614719 1963 48.8692993843963 1964 48.8919583189454 1965 48.9056127977305 1966 48.9206434111489 1967 48.9395624768261 1968 48.9514517667813 1969 48.9604444755049 1970 48.9752326704979 1971 48.9871936446195 1972 48.9938167509837 1973 48.9990452190518 1974 49.0099463021723 1975 49.0532024254704 1976 49.1224745634238 1977 49.1902372262774 1978 49.2310684467166 1979 49.2471058099684 1980 49.2575263109608 1981 49.2671683793661 1982 49.2786081963968 1983 49.2862554568085 1984 49.2921688507534 1985 49.2997294409204 1986 49.3036273327655 1987 49.3090634929183 1988 49.3099055660248 1989 49.3067895367577 1990 49.3037737188524 1991 49.2994911726926 1992 49.2453325299097 1993 49.1483542393662 1994 49.0941163500055 1995 49.1316800812124 1996 49.2205623504987 1997 49.3183842782972 1998 49.4336032170619 1999 49.5441056491451 2000 49.5922441343133 2001 49.5792689462965 2002 49.5535395385385 2003 49.536246142838 2004 49.5261939374361 2005 49.5258698395529 2006 49.5417085973835 2007 49.55538107585 2008 49.5630335590227 2009 49.5735528609041 2010 49.5789493252036 2011 49.5787258891247 2012 49.5823785941311 2013 49.5861300628861 2014 49.5918329909011 2015 49.6016882571121 2016 49.6138276097339 2017 49.6241963234628 2018 49.6380567750543 2019 49.656577990465 2020 49.6797673630314 2021 49.7060929365072 2022 49.732840475106 2023 49.7587308199681