Year	% net
1996	73.25802
1997	76.481
1999	83.31987
2000	86.62082
2005	90.22191
2006	92.61643
2008	92.98594
2013	89.82204
2014	91.58255
2015	92.79255
2016	93.5214
2017	95.0518
2018	96.84329