Year	% of total population
1960	2.92008764984256
1961	2.90399552093879
1962	2.88128443026862
1963	2.85630372239481
1964	2.8298304683323
1965	2.80294635117782
1966	2.77916022889489
1967	2.75988694149307
1968	2.74537013962429
1969	2.73623057973423
1970	2.73193475354971
1971	2.73203067649013
1972	2.73354396275506
1973	2.7360321125214
1974	2.74139651006731
1975	2.74936488353141
1976	2.76035222535748
1977	2.76964271498976
1978	2.77648226408261
1979	2.78680668061127
1980	2.80768864303183
1981	2.83397818499468
1982	2.85684290319461
1983	2.87614541020352
1984	2.88955461365855
1985	2.89836459428105
1986	2.9081286096133
1987	2.91759371254158
1988	2.92332071599315
1989	2.92586786702898
1990	2.92446509304329
1991	2.92304306510892
1992	2.92141175271714
1993	2.91766932076779
1994	2.91253057299789
1995	2.9066395722172
1996	2.89718243731084
1997	2.88524672122595
1998	2.86962960805065
1999	2.84598010709894
2000	2.82055235315092
2001	2.80350940096126
2002	2.79095483881045
2003	2.77488305799712
2004	2.75738387802976
2005	2.74138766568266
2006	2.72789582070683
2007	2.71466904956662
2008	2.70021329953365
2009	2.68265648012352
2010	2.65917858162725
2011	2.63112341317521
2012	2.60526230999014
2013	2.59011154522437
2014	2.5838209423975
2015	2.57693876845108
2016	2.56951489434989
2017	2.56929598307506
2018	2.57827668775889
2019	2.59259393781103
2020	2.6001260045508
2021	2.58768007254527
2022	2.56835416022227
2023	2.57148537316511