Year	% (cumulative)
1970	8.7083797454834
1981	16.4736995697021
1986	19.3234901428223
2004	39.290771484375
2005	42.336109161377
2006	43.2331085205078
2007	44.1678581237793
2008	44.4367904663086
2009	44.666389465332
2010	45.6723594665527
2011	46.3559608459473
2012	46.4467010498047
2013	47.2485542297363
2014	48.009521484375
2015	48.4211196899414
2016	48.892448425293
2017	49.9684829711914
2018	50.4187889099121
2019	51.8637619018555
2020	53.1236114501953
2021	54.4416046142578
2022	54.7870216369629