Year % of total population 1960 42.4542184395551 1961 42.705442247822 1962 42.9670390920827 1963 43.1794342637118 1964 43.3542484728797 1965 43.5446460923669 1966 43.7333323672396 1967 43.9222975298675 1968 44.112988795564 1969 44.3062213662472 1970 44.4979722467492 1971 44.688557066075 1972 44.8820890960186 1973 45.0672734280484 1974 45.2385796310083 1975 45.4143843951864 1976 45.5749847785961 1977 45.691299548143 1978 45.7558549158743 1979 45.7534412041929 1980 45.6802656380518 1981 45.5512044650208 1982 45.3794906923892 1983 45.155994273127 1984 44.9610201527222 1985 44.8431544475552 1986 44.7487908632227 1987 44.6494512152218 1988 44.5559827739849 1989 44.4525028603903 1990 44.3155860461509 1991 44.1582036262863 1992 44.0046402994417 1993 43.8163025679139 1994 43.6536809154583 1995 43.5444364584735 1996 43.4319098059891 1997 43.52242136752 1998 43.5654567080211 1999 43.3562593584492 2000 42.7155930224025 2001 42.1496751330091 2002 42.1003446849414 2003 41.9338750427963 2004 41.614781662436 2005 41.3041791377188 2006 41.017918101603 2007 40.8274110706429 2008 40.8337340447474 2009 40.7046531083184 2010 40.611257527236 2011 40.8227928177904 2012 41.1320707879998 2013 41.4925519356455 2014 41.7814533329194 2015 41.997874964507 2016 42.1065031420483 2017 42.1031920117304 2018 42.0337518668231 2019 41.888683400253 2020 41.6719395093871 2021 41.4012049064002 2022 41.0506690982081 2023 40.6096642976949