Year	% net
1999	93.89429
2000	94.6003
2001	90.55755
2003	93.3191
2004	92.31919
2005	88.69065
2006	78.49285
2009	76.89243
2010	76.81868
2011	75.18269
2015	81.9211
2016	91.18397