Year	% of people ages 15 and above
1978	46.4753112792969
1979	46.9482612609863
1980	47.5308685302734
1981	48.111011505127
1982	48.676830291748
1983	48.8991813659668
1984	49.6164398193359
1985	50.5042190551758
1986	51.3067283630371
1987	51.9821090698242
1988	52.9797286987305
1989	53.8549308776855
1990	54.795768737793
1991	55.8139114379883
1992	56.8638610839844
1993	57.6829414367676
1994	58.4487800598145
1995	59.5942916870117
1996	60.8810386657715
1997	61.8283309936523
1998	63.0368881225586
1999	64.1111602783203
2000	64.8062973022461
2001	66.2423477172852
2002	67.3601989746094
2003	69.9890289306641
2004	70.5737762451172
2005	70.2333297729492
2006	69.1274108886719
2007	69.8765869140625
2008	70.676628112793
2009	69.5803909301758
2010	70.5184173583984
2011	72.2774963378906
2012	75.7018890380859
2013	73.276481628418
2014	77.5778732299805
2015	74.9812088012695
2016	76.3867263793945
2017	77.1703033447266
2018	74.2861328125
2019	74.6036605834961
2020	75.0228805541992
2021	75.2311782836914
2022	75.1715316772461