Year % of total population 1960 42.9361135232127 1961 42.820215597446 1962 42.7264970991851 1963 42.6960125213748 1964 42.7476110914425 1965 42.8430334825952 1966 42.9513449881125 1967 43.0615947668119 1968 43.1741459287879 1969 43.3047589831499 1970 43.4564982574948 1971 43.651914029444 1972 43.8659512414289 1973 44.0496642579515 1974 44.2119667644249 1975 44.3622986628191 1976 44.5109210663819 1977 44.6457735966792 1978 44.5515551347721 1979 44.3315113910641 1980 44.2878405869941 1981 44.3469934252702 1982 44.4059889749963 1983 44.461788284332 1984 44.4587902319394 1985 44.4667900062893 1986 44.52907083255 1987 44.5782102013739 1988 44.6223556132944 1989 44.6655026763637 1990 44.6653960695091 1991 44.6813577119304 1992 44.8199530930864 1993 44.8949769123799 1994 44.4456871913015 1995 44.2846955911618 1996 44.9368742301948 1997 45.6220827722228 1998 45.9472175767378 1999 46.0527487754763 2000 46.1231822640946 2001 46.1288327417253 2002 46.1121792222366 2003 46.1398673725179 2004 46.1580376187388 2005 46.1385557355617 2006 46.1177801466165 2007 46.110886583056 2008 46.1381989420547 2009 46.1904019577835 2010 46.1835245866786 2011 46.1239657216363 2012 46.1305560725312 2013 46.1702713098871 2014 46.2084159445942 2015 46.2541847963796 2016 46.2620849204725 2017 46.2777940529196 2018 46.3484911213574 2019 46.4374579832677 2020 46.4939302095622 2021 46.5250082047524 2022 46.5374617115253 2023 46.5050439133989