Year	% net
1999	92.01562
2000	92.09559
2001	92.89068
2002	93.63145
2003	93.75431
2004	92.39831
2005	93.68388
2006	93.48714
2007	93.00691
2008	92.28063
2009	91.37033
2010	90.70257
2011	90.0593
2012	90.00423
2013	91.49385
2014	91.91535
2015	93.03199
2016	93.71875
2017	94.23769