Year	% net
1980	58.99967
1983	65.15376
1984	63.4174
1985	64.44154
1991	74.81371
1998	80.02673
1999	79.93729
2002	80.41887
2004	87.5413
2005	86.77164
2006	85.25507
2010	91.7859