Year % of total population 1960 52.581511238473766 1961 52.52724626729501 1962 52.47423928913577 1963 52.422653152624 1964 52.37482450632614 1965 52.33174118631545 1966 52.29197693257872 1967 52.25734616393517 1968 52.22675257599549 1969 52.20044579970858 1970 52.191526384866485 1971 52.175914191793254 1972 52.13905270403695 1973 52.103643801711506 1974 52.06896484859126 1975 52.037634605639674 1976 52.01698371507519 1977 52.00045237021515 1978 51.9832004060958 1979 51.968959016714464 1980 51.94844835135651 1981 51.924886357599156 1982 51.90468603564308 1983 51.883596930424424 1984 51.863502981015394 1985 51.84363940341671 1986 51.82157065074108 1987 51.79743269041469 1988 51.77364339956094 1989 51.748975079674246 1990 51.725318661099536 1991 51.70767290145688 1992 51.695745273601105 1993 51.690145933267516 1994 51.690116318227204 1995 51.69466365584791 1996 51.69981165222798 1997 51.70328609810897 1998 51.70586694305757 1999 51.70843190663156 2000 51.70887634724958 2001 51.71048210358405 2002 51.71179209639455 2003 51.71037754277287 2004 51.708862549716805 2005 51.70715605772899 2006 51.70390148801717 2007 51.695147690301766 2008 51.681509949850216 2009 51.66802685816363 2010 51.652387384250034 2011 51.63486263890263 2012 51.61447677495719 2013 51.59334586597999 2014 51.57289764145704 2015 51.55113906608921 2016 51.52924900126263 2017 51.509424313620556 2018 51.49082062946302 2019 51.47629575526405 2020 51.46894076711264 2021 51.4661622699194 2022 51.453911792072205 2023 51.44979955385132