Year	% net
2005	60.37654
2006	64.0798
2007	66.75963
2008	68.15368
2009	71.107
2010	72.45884
2011	74.45407
2012	72.67917
2013	73.36464
2014	72.71928
2015	72.78667
2016	73.47255
2017	73.92565
2018	74.88658