Year % of total population 1960 46.0992466731497 1961 46.3034225400542 1962 46.5177811939302 1963 46.7738431299463 1964 47.0370658385749 1965 47.2539344665406 1966 47.4428485207852 1967 47.61387777575 1968 47.7675875133169 1969 47.9363646254545 1970 48.2093089356936 1971 48.5459050496157 1972 48.8494235926607 1973 49.1171835662904 1974 49.3432919095651 1975 49.5340785332399 1976 49.6878882817521 1977 49.7990175209027 1978 49.8719106673471 1979 49.9071795298879 1980 49.8895233100615 1981 49.8057942191086 1982 49.6503507410663 1983 49.4873805658353 1984 49.3665644714304 1985 49.2497811618693 1986 49.1103498246327 1987 48.9765912392283 1988 48.8699091416958 1989 48.7876663994002 1990 48.7171889678928 1991 48.656066066148 1992 48.6191467721036 1993 48.6038399004705 1994 48.60899816573 1995 48.6404200671927 1996 48.6676954969429 1997 48.6413213219329 1998 48.5936411368236 1999 48.5328993767279 2000 48.4162308766269 2001 48.2101683247704 2002 48.0038411561457 2003 47.8270198680141 2004 47.6659852842857 2005 47.5136922210839 2006 47.3518985713442 2007 47.1754923551893 2008 46.9793877529664 2009 46.7766992361591 2010 46.5812660035159 2011 46.4141828850425 2012 46.2436870356708 2013 46.039494909608 2014 45.7890220058175 2015 45.5004452792704 2016 45.1898719569617 2017 44.8572985393992 2018 44.496182501207 2019 44.0999040476453 2020 43.6803729346094 2021 43.2623628719068 2022 42.8565530212675 2023 42.4488572107447