Year	% (cumulative)
1970	5.78318
1975	8.20899
1980	11.60523
1985	13.13693
1988	16.76171
2005	11.34033
2006	10.86709
2007	10.6414
2008	10.81915
2012	14.36101
2013	11.6332
2015	12.14164
2017	13.82776
2018	14.96943