Year	% net
2002	84.48945
2003	82.67607
2005	81.05196
2006	83.44942
2007	87.87505
2011	95.15386
2012	96.41176
2013	95.00256
2014	93.76733
2015	92.69541
2016	92.23963
2017	91.94625
2018	90.72273