Year	% net
1991	87.74155
1992	88.4503
1993	90.28127
1994	90.87498
1995	91.0755
1996	87.90795
2008	91.30667
2009	90.68133
2010	90.7157
2011	89.70965
2013	87.2911
2014	86.53403
2015	85.85346
2018	83.8887