Year	% net
1999	88.02071
2000	88.10903
2002	87.81913
2003	87.8824
2004	87.84762
2005	88.69619
2006	89.17722
2007	87.86998
2008	87.88928
2009	87.64705
2010	86.85324
2011	86.67158
2012	86.23705
2013	86.42403
2014	86.70508
2015	86.99795
2016	87.53142
2017	87.11869