Year % of total population 1960 49.656210862607566 1961 49.64516106395102 1962 49.62316326148383 1963 49.600954013363946 1964 49.57458300330881 1965 49.54464598193852 1966 49.53239986318878 1967 49.53646836094695 1968 49.53496554558986 1969 49.52866857422395 1970 49.52109636094143 1971 49.51093296609975 1972 49.5008987268756 1973 49.493850435829806 1974 49.478590146623105 1975 49.44420819395153 1976 49.39755118434565 1977 49.338455250594514 1978 49.27082892055258 1979 49.206856117904316 1980 49.14687328167791 1981 49.09763588696829 1982 49.06401119188762 1983 49.03976953906942 1984 49.01684928840919 1985 48.98721691972732 1986 48.955036204393345 1987 48.92661445890676 1988 48.906246003989516 1989 48.88217736739166 1990 48.86539966682716 1991 48.83382860957015 1992 48.79406901306857 1993 48.770310275009024 1994 48.75260839835394 1995 48.73947630484239 1996 48.72292493597194 1997 48.695506449892555 1998 48.67862326774621 1999 48.670053273418446 2000 48.6624714815652 2001 48.658931387482056 2002 48.65584177150375 2003 48.65531576995154 2004 48.66309446487694 2005 48.648754965871596 2006 48.578994836450924 2007 48.47453506227072 2008 48.36721917831894 2009 48.28107906751492 2010 48.243234645139566 2011 48.22865517096498 2012 48.21393293642887 2013 48.20525530273956 2014 48.19501862199983 2015 48.15498078013865 2016 48.111018748405115 2017 48.104486015968774 2018 48.11809215161494 2019 48.148468294663864 2020 48.21858553663668 2021 48.2890291618631 2022 48.32677147068908 2023 48.35997809380234