Year	% (cumulative)
1970	21.7691097259521
1989	55.1278610229492
2004	77.1700286865234
2005	83.3765411376953
2006	80.4160079956055
2007	92.4862518310547
2008	91.8047637939453
2014	95.3348388671875
2015	94.2126235961914