Year % of total population 1960 48.4918562620797 1961 48.4543130731153 1962 48.4186959379399 1963 48.3948661803233 1964 48.4152915497953 1965 48.3964796785077 1966 48.278252313012 1967 48.140536990787 1968 48.0214555074137 1969 47.9203874978997 1970 47.8384141438955 1971 47.7740103762409 1972 47.7507407606136 1973 47.8703191930358 1974 47.8727162774393 1975 47.642048466713 1976 47.4013157894737 1977 47.1779306437748 1978 46.9696205360229 1979 46.7734761088097 1980 46.5849624669223 1981 46.4029254357707 1982 46.2310482116286 1983 46.070150882465 1984 46.0244176889798 1985 46.0924194008489 1986 46.1737423390376 1987 46.2640649560231 1988 46.3547151419907 1989 46.440835226373 1990 46.5225137792623 1991 46.5986299770312 1992 46.667761574147 1993 46.7292413371265 1994 46.7894096821233 1995 46.8531688676022 1996 46.9220545942732 1997 46.9966624142808 1998 47.0748220925998 1999 47.1505524517803 2000 47.3719588964827 2001 47.7341944033984 2002 48.0876639077828 2003 48.4314787842114 2004 48.7631169975612 2005 49.0778840511094 2006 49.2261067414385 2007 49.2128898340986 2008 49.1912651303632 2009 49.1755200433446 2010 49.1679436252809 2011 49.1240329068611 2012 49.0904909308043 2013 49.1166825752967 2014 49.1527878087771 2015 49.2044310333829 2016 49.2585236118071 2017 49.2878231229484 2018 49.2987040493576 2019 49.3230719393621 2020 49.3539468784068 2021 49.3783551886582 2022 49.3997437885156 2023 49.4257437298828