Year	% net
1998	53.94938
1999	55.57571
2000	57.53137
2001	57.8411
2002	57.51591
2003	59.90419
2004	61.95302
2005	63.20226
2006	62.89806
2007	65.62021
2008	63.16285
2009	64.43786
2010	65.3204
2011	66.23072
2012	66.66148