Year	% of total population
1960	39.2881564668801
1961	40.6140775572195
1962	41.8252427749957
1963	42.8706695106415
1964	43.6186225632228
1965	44.0812400011597
1966	44.4149263597433
1967	44.6328823064338
1968	44.7291578415376
1969	44.717317650336
1970	44.6056021716773
1971	44.4025306102982
1972	44.1073564872646
1973	43.7284596085736
1974	43.2891633454634
1975	42.8128082611158
1976	42.3268787181321
1977	41.8535636363568
1978	41.4048461538179
1979	41.0023466638992
1980	40.6542518810012
1981	40.3786857083531
1982	40.1952280002562
1983	40.0869994752129
1984	40.0358456943265
1985	40.0410608684565
1986	40.1137925944906
1987	40.2303249919363
1988	40.3197404222479
1989	40.3971801866372
1990	40.4255756659078
1991	40.3408724439113
1992	40.2025713575862
1993	40.0363147194662
1994	39.8159924307467
1995	39.5406805858956
1996	39.2855025455158
1997	38.9873323444874
1998	38.5331209907216
1999	37.944619729556
2000	37.2347964558695
2001	36.4145365768202
2002	35.525243465667
2003	34.6526545825136
2004	33.7760322437151
2005	32.9242443624604
2006	32.1818867027222
2007	31.518217100699
2008	30.9366564168325
2009	30.4798128994315
2010	30.174757086198
2011	30.0201191554674
2012	29.9981479045674
2013	30.0785984842524
2014	30.2310003333832
2015	30.4216914741812
2016	30.6310669147797
2017	30.8462359067774
2018	31.0338997135398
2019	31.1680593398956
2020	31.2326832135604
2021	31.2166944845002
2022	31.1197312981392
2023	30.9338024278326