Year	% net
2002	85.14163
2003	86.45427
2004	88.28267
2005	87.84709
2006	87.07428
2007	86.58337
2008	85.9498
2009	85.70593
2010	85.63455
2011	85.48102
2012	85.32587
2013	84.20808
2014	84.22573
2015	84.75642
2016	85.03241
2017	84.75751