Year	% net
1999	82.02676
2000	82.35159
2001	82.72222
2002	83.68739
2003	85.20446
2005	88.49412
2008	93.3058
2009	96.49343
2010	95.03317
2011	94.33046
2012	94.13438
2013	93.30197
2014	92.39203
2015	92.24036
2016	91.87656
2017	92.39267