Year	% net
1971	47.9378
1990	65.57641
2000	73.18593
2001	73.51308
2002	73.865
2003	82.96788
2007	90.92672
2008	91.95885
2009	92.31843
2010	92.35823
2011	92.04912
2012	92.43548
2013	93.02689