Year	% net
1999	81.26537
2000	81.55345
2001	82.02218
2002	83.00975
2003	84.43005
2005	87.44927
2008	92.08661
2009	94.74977
2010	92.22686
2011	92.99278
2012	92.78112
2013	91.97815
2014	91.13385
2015	90.52512
2016	90.35332
2017	90.81997