Year	% net
1992	88.84671
1993	89.7622
1999	89.74714
2004	88.85849
2005	90.30662
2006	86.02969
2007	86.97546
2008	85.40346
2009	82.75083
2010	80.59475
2011	85.48546
2012	79.82857
2013	74.58828
2014	75.76249
2015	79.61804
2016	76.43089
2018	75.13181