Year	% of total population
1960	4.72665719704525
1961	4.78263146970288
1962	4.98542323356209
1963	5.23179764699077
1964	5.56906715937582
1965	5.96879801135436
1966	6.41053899711002
1967	6.86336220477596
1968	7.29779890097846
1969	7.71294050986026
1970	8.10839346198916
1971	8.47896870866155
1972	8.80781211612638
1973	9.10323702221202
1974	9.38568589192938
1975	9.64732100302239
1976	9.87198214271512
1977	10.040495552311
1978	10.1270604348588
1979	10.100819297542
1980	9.96891478858842
1981	9.76589468479238
1982	9.52144915708128
1983	9.30130722074304
1984	9.17823348167047
1985	9.1903831228985
1986	9.32768618820667
1987	9.53925336664526
1988	9.79754244789106
1989	10.0991404104124
1990	10.4385167451985
1991	10.8000917325736
1992	11.1559555946455
1993	11.5032717440877
1994	11.881967655761
1995	12.2966205349064
1996	12.7227230908922
1997	13.1761396917259
1998	13.6801036778383
1999	14.199168076312
2000	14.6818811592457
2001	15.1487595628757
2002	15.5840986423981
2003	15.9673585790513
2004	16.322378331648
2005	16.6341950600081
2006	16.9146281847308
2007	17.1643288742944
2008	17.3636963513464
2009	17.5269634911238
2010	17.6937418312086
2011	17.9005588368384
2012	18.1491051097041
2013	18.4587009182566
2014	18.8473626583386
2015	19.2660518736894
2016	19.5924205769216
2017	19.8936955450054
2018	20.2273582700034
2019	20.541428178724
2020	20.7446461876994
2021	20.7201311100935
2022	20.5577047720407
2023	20.4763580302994