Year	% (cumulative)
1974	0.359510004520416
2005	2.79076600074768
2006	3.19714879989624
2007	7.01957988739014
2008	3.70252442359924
2009	3.69507360458374
2010	4.19982576370239
2011	7.75050020217896
2012	7.08099985122681
2013	4.80464267730713
2014	9.66020965576172
2015	9.65742969512939
2016	10.6182804107666
2017	5.75871896743774
2018	10.0582304000854
2019	11.427300453186