Year	% (cumulative)
1974	11.5815801620483
2001	45.7299995422363
2004	46.0299987792969
2005	46.4300003051758
2006	48.1644058227539
2007	46.142261505127
2008	50.9534149169922
2009	51.4099998474121
2010	51.6699981689453
2011	53.5099983215332
2012	53.2099990844727
2013	55.2900009155273
2014	58.6399993896484
2015	60.3800010681152
2016	61.5800018310547
2017	59.6922378540039
2018	59.9700012207031
2019	62.2099990844727