Year % of total population 1960 2.37700861634552 1961 2.37018899416701 1962 2.36571808026391 1963 2.36402683669902 1964 2.3619485620989 1965 2.35990745460962 1966 2.36029143343879 1967 2.36217425434604 1968 2.36538832282526 1969 2.37126961439215 1970 2.37960216731991 1971 2.38993771785395 1972 2.40107041520892 1973 2.41464890031671 1974 2.43147494810653 1975 2.44954502163826 1976 2.46993427972723 1977 2.49092024963668 1978 2.51405586362439 1979 2.54002166324474 1980 2.56876757192826 1981 2.5996113297608 1982 2.63251326885285 1983 2.66822795718731 1984 2.70596492720641 1985 2.74679688273949 1986 2.79054112937881 1987 2.83701602642668 1988 2.88658644118095 1989 2.93958754816624 1990 2.99798367601291 1991 3.06177449754276 1992 3.13163987515203 1993 3.21021123650732 1994 3.28857315789928 1995 3.37123911922599 1996 3.45845721068514 1997 3.55133351009847 1998 3.64789977429473 1999 3.78736930594231 2000 3.96538188407155 2001 4.14018440605138 2002 4.3100050399969 2003 4.47183936390982 2004 4.62044859082664 2005 4.73411897371266 2006 4.81136916746069 2007 4.88157878328408 2008 4.96015147802713 2009 5.04731770768012 2010 5.14176493391721 2011 5.24027782353341 2012 5.3401844704016 2013 5.44280778198586 2014 5.55233399017053 2015 5.67576694462607 2016 5.81278179794508 2017 5.88311534588026 2018 5.89964656706861 2019 5.95008984193292 2020 6.03205670894466 2021 6.13624802488532 2022 6.25384207398509 2023 6.37750031907821