Year	% net
2000	79.32603
2001	79.26055
2002	80.22968
2003	81.72034
2004	83.18216
2005	83.22422
2006	83.05661
2007	81.85387
2008	85.21789
2009	80.48338
2010	79.31622
2011	78.39118
2012	78.3322
2013	77.7174
2014	77.1835
2015	76.6095
2016	76.56169
2017	77.78425
2018	77.59551