Year	% net
1986	69.05872
1991	77.01311
1999	94.30288
2000	93.83488
2001	91.65179
2002	92.35925
2004	93.06034
2009	92.52637
2010	91.39447
2011	91.45634
2012	89.93366
2013	90.09056
2014	90.47222
2015	92.03987
2016	93.16734
2017	93.37977
2018	93.16194