Year	% net
1996	73.62613
1997	76.91283
1999	82.18443
2000	85.2912
2005	88.04291
2006	88.2985
2007	91.36429
2008	91.34337
2009	87.67605
2013	88.75413
2014	90.22179
2015	91.29973
2016	92.4141
2017	94.21028
2018	95.94754