Year	% net
1999	97.74424
2000	94.82919
2001	91.96333
2003	92.11363
2004	93.30201
2005	92.96664
2006	93.62886
2007	93.3871
2008	93.81454
2009	94.92075
2010	95.41596
2011	95.14914
2012	96.65387
2013	95.743
2014	96.35903
2015	96.20372
2016	96.11602
2017	96.18248
2018	95.94237