Year % of total population 1960 5.10024749780292 1961 5.2550865705885 1962 5.40438676436834 1963 5.55539359333296 1964 5.70487386521845 1965 5.85743700936329 1966 6.01832540941728 1967 6.19186715722174 1968 6.38160916269101 1969 6.59325142622485 1970 6.75274878512108 1971 6.82750794567109 1972 6.88787065243382 1973 6.9559502774204 1974 7.04260679482587 1975 7.14533841430437 1976 7.25648709996107 1977 7.38517760608954 1978 7.53969507904369 1979 7.74601668620634 1980 7.96472620344727 1981 8.12566249775652 1982 8.25244291928286 1983 8.37713761579431 1984 8.52730958988385 1985 8.70599560400073 1986 8.882333136292 1987 9.06215869822865 1988 9.2435584657492 1989 9.45755592588002 1990 9.65265717311946 1991 9.77340884648505 1992 9.90807525489055 1993 10.0492261078618 1994 10.1722003015168 1995 10.3247104917709 1996 10.491756682597 1997 10.6452875076007 1998 10.7882898263874 1999 10.9423089516076 2000 11.1517481147974 2001 11.4084956907788 2002 11.6728122923477 2003 11.9493960273456 2004 12.2466195638135 2005 12.5628324248816 2006 12.9108105663132 2007 13.2995624351069 2008 13.7278801113311 2009 14.1975819614091 2010 14.7100719165168 2011 15.2780734930575 2012 15.8968400115036 2013 16.5474418108015 2014 17.2427019527049 2015 17.9965459414097 2016 18.7999355034265 2017 19.6399842205698 2018 20.4137868910293 2019 21.0772676191542 2020 21.7050435655479 2021 22.3564297291715 2022 22.9302021548964 2023 23.3652188102128