Year	% net
1998	89.0652
1999	90.06879
2000	91.37488
2001	92.02806
2002	92.6313
2003	92.96358
2004	92.23803
2005	92.02712
2006	91.66008
2007	93.14014
2008	93.05556
2009	93.45478
2010	94.02173
2011	94.12994
2012	94.0584
2013	95.17996
2014	94.78695
2015	96.42797
2016	95.46
2017	95.68577