Year	% net
1999	64.98576
2000	75.21622
2001	78.24222
2002	81.47676
2004	84.23301
2005	84.34863
2006	85.12753
2007	86.10961
2008	86.37927
2009	85.87433
2010	86.88789
2011	87.47726