Year % of total population 1960 4.29735992983059 1961 4.1912794031684 1962 4.08727916992 1963 3.99059180895008 1964 3.90763160338565 1965 3.83644546367284 1966 3.77796304535272 1967 3.73174628280888 1968 3.69310461503102 1969 3.65873247979181 1970 3.62674938105685 1971 3.59969060947491 1972 3.57724574610414 1973 3.55571501784687 1974 3.53115266858363 1975 3.50003000123977 1976 3.46491072479572 1977 3.4243620198491 1978 3.37512763705809 1979 3.32519437635998 1980 3.27978765786867 1981 3.21445280079851 1982 3.15239542183853 1983 3.11712308527039 1984 3.10036057037062 1985 3.1044905794707 1986 3.12881357657846 1987 3.17356786302137 1988 3.23106625892718 1989 3.2905782218781 1990 3.32511262172962 1991 3.35505755275359 1992 3.40793211401142 1993 3.48973557716847 1994 3.58246675875021 1995 3.6644699385436 1996 3.75311421549838 1997 3.84490881219682 1998 3.93376394770612 1999 4.02288837298145 2000 4.11132639780381 2001 4.19626509551555 2002 4.30119267026682 2003 4.40741780049677 2004 4.49191323908603 2005 4.5691422047548 2006 4.64525530590803 2007 4.72998341379086 2008 4.81958596105901 2009 4.91421969560316 2010 5.01976713278099 2011 5.1445901941647 2012 5.28617914144647 2013 5.43555543758867 2014 5.60278992165146 2015 5.78712967254567 2016 6.00341231380047 2017 6.2530663468484 2018 6.51868129578369 2019 6.80511038500649 2020 7.1076541617204 2021 7.37506181870231 2022 7.62273636409116 2023 7.93402317548361