Year	% net
2007	90.11097
2008	88.69125
2009	88.21265
2010	89.1713
2011	89.70999
2012	91.43744
2013	92.8049
2014	94.09132
2015	94.44588
2016	95.11214
2017	96.26941
2018	94.59704