Year	% net
1998	90.07971
1999	89.78352
2000	89.27671
2001	88.59585
2002	88.3765
2003	86.88503
2004	86.67899
2005	86.58433
2006	85.81162
2007	84.90015
2008	84.46588
2009	84.36045
2010	84.71133
2012	83.88717
2013	88.23059
2014	88.93431
2015	91.91605
2017	94.86301