Year	% (cumulative)
1974	0.860329985618591
1981	1.27348005771637
2001	4.2086501121521
2011	10.2457599639893
2012	10.507209777832
2013	9.41856002807617
2014	10.2895097732544
2015	13.9909801483154
2016	14.3473196029663
2017	14.9236602783203
2018	15.5677995681763
2019	16.2052707672119
2021	17.8183307647705