Year % of total population 1960 3.31467636752739 1961 3.38747576166602 1962 3.46073941919275 1963 3.52097124696013 1964 3.57221934027313 1965 3.62820793676531 1966 3.67788027690865 1967 3.72631367659604 1968 3.7764886948346 1969 3.81998838271267 1970 3.86659757976226 1971 3.92213735908924 1972 3.97707812077256 1973 4.04214577600239 1974 4.11891134920431 1975 4.20564140494733 1976 4.28730345029188 1977 4.37237100690569 1978 4.47356573009347 1979 4.56454276527035 1980 4.64802067441549 1981 4.74164246568433 1982 4.84169324708297 1983 4.93429097434287 1984 5.02707989408416 1985 5.13571059763578 1986 5.25970190423878 1987 5.39697284245528 1988 5.54791313375066 1989 5.72139025899793 1990 5.91446681478075 1991 6.12837590300005 1992 6.36727317659749 1993 6.6094476891836 1994 6.84084372071304 1995 7.05565924634017 1996 7.2525351113109 1997 7.44281849047581 1998 7.6252462034754 1999 7.79857002418325 2000 7.98309722473233 2001 8.17336548102022 2002 8.35879669601798 2003 8.53887054139193 2004 8.71281374653979 2005 8.88722943255929 2006 9.06432242847832 2007 9.23390891421944 2008 9.4080432259799 2009 9.60175001590583 2010 9.79220851930251 2011 9.99416953012632 2012 10.2210581606688 2013 10.474388396135 2014 10.7471696333849 2015 11.0366665614631 2016 11.3366907803162 2017 11.6120644511548 2018 11.8677398846683 2019 12.1254064349585 2020 12.3955778026311 2021 12.6811424782852 2022 13.0310844368264 2023 13.4709588942