Year	% (cumulative)
1975	6.33633995056152
1985	8.1019401550293
1996	10.2117900848389
2003	9.92395973205566
2006	9.60365962982178
2008	9.51636981964111
2009	9.65250968933105
2010	9.40847015380859
2011	10.940710067749
2012	10.8821496963501
2013	11.7874202728271
2014	12.1393804550171
2015	12.4214000701904
2016	12.2462196350098
2017	13.1665096282959
2018	13.317720413208
2019	13.6994800567627