Year	% net
1995	87.03452
1996	90.60952
1998	93.86149
1999	94.96768
2000	95.59569
2001	95.81607
2002	95.87851
2003	94.52595
2004	93.9248
2005	93.81157
2006	93.00778
2007	94.47473
2008	94.11625
2009	93.78504
2010	96.75183
2011	97.38176
2012	97.40301
2013	96.16833
2014	94.15752
2015	93.48484
2016	93.48397
2017	93.68129