Year	% net
1995	83.08933
1996	85.24298
1998	89.39312
1999	89.18803
2000	90.95167
2001	92.71941
2002	94.48267
2003	96.39001
2004	97.50945
2005	98.60829
2006	99.64591
2007	99.30088
2008	98.24224
2009	97.24047
2010	96.98128
2011	97.30754
2012	97.04006
2013	97.46028
2014	97.59719
2015	97.50248
2016	97.52441
2017	98.42562