Year	% net
1998	83.99954
1999	86.00243
2000	87.71651
2001	89.95082
2002	91.81793
2003	93.61944
2005	90.43858
2006	90.07755
2007	89.78888
2008	88.02296
2009	85.8984
2010	85.81516
2011	87.64469
2012	89.14168
2013	88.65935
2014	88.74208
2015	88.94188
2016	87.6378
2017	88.0407