Year	% net
1992	90.55332
1993	90.62214
1999	70.34891
2004	79.85233
2005	82.22038
2006	83.4111
2007	87.11506
2008	85.26774
2009	82.93533
2010	82.15272
2011	76.3328
2012	78.52802
2013	71.12629
2014	74.0697
2015	59.99897
2016	68.04682
2017	66.43519
2018	65.04684