Year % of total population 1960 5.540773045487062 1961 5.5809521491812 1962 5.662293968928218 1963 5.7333504552539125 1964 5.8008576015855455 1965 5.869328318612026 1966 5.933711334562329 1967 5.9855474937468385 1968 6.127337588775705 1969 6.347575954533781 1970 6.5799890763938285 1971 6.828523850469384 1972 7.090590189989919 1973 7.378199396061117 1974 7.705736119031926 1975 8.061548076893178 1976 8.448081699306005 1977 8.863887873461623 1978 9.304694674834051 1979 9.765766707383392 1980 10.248335758179335 1981 10.46174317125744 1982 10.679233104892436 1983 10.902117230379062 1984 11.129849619488507 1985 11.359739601904987 1986 11.593109644716948 1987 11.831856210239875 1988 11.935854917231193 1989 12.040225489528769 1990 12.144341002435489 1991 12.24533559037626 1992 12.345466936063545 1993 12.443571784286945 1994 12.413345713513433 1995 12.282466678483821 1996 12.182589220904765 1997 12.093051618335583 1998 12.013988581125936 1999 11.944235983902777 2000 11.884940248578136 2001 11.83505112722489 2002 11.795610965559403 2003 11.748029693579188 2004 11.689407418201982 2005 11.638903344270371 2006 11.597366387628595 2007 11.563000867201561 2008 11.532913398711441 2009 11.550568356076106 2010 11.588185981491455 2011 11.629682612291447 2012 11.668522330445837 2013 11.702740508600593 2014 11.732630065488395 2015 11.759356386477718 2016 11.786600432751806 2017 11.816484045642788 2018 11.848991126465487 2019 11.884339313001863 2020 11.923254797232369 2021 11.967191167965359 2022 12.016099631844456 2023 12.069720594777971