Year	% net
1980	50.35863
1983	61.79138
1984	63.92071
1985	69.04143
1991	62.17648
1998	74.0159
1999	69.46533
2002	73.66539
2004	96.38376
2005	93.49917
2006	83.14832
2010	96.0349