Year	% net
1994	91.54598
1995	90.50608
1996	78.42221
1997	87.00003
1998	86.77309
1999	87.14489
2000	87.82211
2001	88.60332
2002	89.1568
2003	88.63265
2004	88.68183
2005	89.3733
2006	90.61516
2007	89.72605
2008	91.18075
2009	91.91353
2010	92.05381
2011	91.45924
2012	90.78135
2013	90.77126
2014	91.07825
2015	91.23812
2016	91.39837
2017	90.83399