Year	% (cumulative)
1970	4.03680992126465
1981	9.55107975006104
1986	12.3999996185303
2004	35.3535499572754
2005	38.5512313842773
2006	39.7431983947754
2007	40.567211151123
2008	41.3038215637207
2009	42.0677108764648
2010	42.9019584655762
2011	44.235481262207
2012	44.8063888549805
2013	46.4250221252441
2014	46.510440826416
2015	47.3387107849121
2016	48.4208297729492
2017	49.7679901123047
2018	50.4153099060059
2019	52.5097541809082
2020	53.3810691833496
2021	55.503776550293
2022	55.8791999816895