Year	% net
1998	60.64918
1999	62.0583
2000	63.97524
2001	64.16925
2002	63.80274
2003	65.53305
2004	67.6177
2005	68.35673
2006	67.4201
2007	71.08144
2008	68.11168
2009	69.12395
2010	69.74771
2011	70.25674
2012	70.51198