Year	% net
1998	57.08466
1999	57.8382
2000	55.04421
2001	56.97167
2002	59.28596
2003	59.85975
2004	61.92233
2005	62.15861
2006	64.23496
2007	62.37628
2008	63.64615
2009	64.97627
2010	66.97126
2011	67.39136
2012	66.70892
2013	66.19857