Year	% net
2000	88.51682
2001	91.24836
2002	90.93192
2003	92.23459
2004	92.07622
2005	90.62146
2006	87.74714
2007	87.03107
2008	86.94637
2009	86.81535
2010	87.4003
2011	87.08558
2012	87.60779
2013	87.6292
2014	86.77036
2015	86.17302
2016	86.22262
2017	85.95203
2018	86.19406