Year	% net
1971	57.38282
1973	63.22935
1974	56.11856
1978	61.466
2000	88.66937
2001	89.82453
2002	88.2775
2003	90.16079
2004	88.7163
2005	88.7964
2006	88.03024
2008	89.43049
2009	88.05623
2010	88.4284