Year	% net
1985	61.23216
1992	66.84783
1994	69.62751
1999	77.33152
2000	79.56919
2001	81.45613
2011	80.07246
2012	80.17795
2013	79.1587
2014	79.13165
2015	79.98163
2016	78.12074
2017	68.10811