Year	% net
1999	82.82476
2000	83.18619
2001	83.45319
2002	84.39449
2003	86.01277
2005	89.58715
2008	94.58472
2009	98.32342
2010	97.97959
2011	95.73551
2012	95.55625
2013	94.69333
2014	93.71508
2015	94.04569
2016	93.48202
2017	94.05053