Year	% net
1998	90.41642
1999	91.67461
2000	93.07391
2001	93.20744
2002	93.20608
2003	93.42478
2004	92.52106
2005	92.28438
2006	92.16514
2007	93.5662
2008	93.68166
2009	94.20675
2010	94.65004
2011	94.67958
2012	94.87187
2013	95.96427
2014	95.57794
2015	97.34698
2016	96.34596
2017	96.62219