Year	% net
2002	85.66066
2003	86.81397
2004	88.93781
2005	88.56987
2006	87.78335
2007	87.16633
2008	86.5723
2009	86.4257
2010	86.40775
2011	86.16452
2012	85.9324
2013	84.86863
2014	84.78667
2015	85.34023
2016	85.60965
2017	85.3043