Year % of total population 1960 2.44580961328925 1961 2.51514535757636 1962 2.58251581167739 1963 2.64744540672342 1964 2.71181541358163 1965 2.76267980083032 1966 2.81593123209722 1967 2.88649387784051 1968 2.95877246539355 1969 3.03032353868879 1970 3.09927474602863 1971 3.16519745070297 1972 3.23051981794317 1973 3.29576660223122 1974 3.36027076530592 1975 3.42319180054841 1976 3.4836216123093 1977 3.54059116124773 1978 3.5921507056051 1979 3.63687210445953 1980 3.67442651190843 1981 3.7050202484618 1982 3.73033342764045 1983 3.75343791579717 1984 3.77694812805872 1985 3.80452322297883 1986 3.83832708863751 1987 3.87757429632136 1988 3.92231643779767 1989 3.97517957801577 1990 4.03950570365458 1991 4.11420584645079 1992 4.19843471744056 1993 4.29118646077432 1994 4.38844244421507 1995 4.48837020734847 1996 4.58930602490695 1997 4.69086936862949 1998 4.79466730263417 1999 4.9016904918141 2000 5.01128656593442 2001 5.12255524339804 2002 5.23541317474817 2003 5.34760871857336 2004 5.45351692891052 2005 5.55179761507416 2006 5.64329538481029 2007 5.72622007818511 2008 5.80009077084034 2009 5.86691168927594 2010 5.92834660184594 2011 5.98542680527852 2012 6.03558542121849 2013 6.0812870096872 2014 6.13010307938018 2015 6.18552594699389 2016 6.25486179727001 2017 6.34506609059864 2018 6.458385226163 2019 6.59381824686952 2020 6.70951911634314 2021 6.77963147468845 2022 6.85716522052911 2023 7.02462865624748