Year	% net
1994	33.22648
1996	38.07619
1998	42.79821
1999	45.66068
2001	51.65877
2002	52.87572
2003	54.13995
2004	56.20782
2005	57.02914
2006	57.42306
2007	58.11186
2008	59.36683
2009	59.90882
2010	60.94171
2011	62.70972
2012	65.88458