Year	% net
1994	16.86085
1995	18.18823
1997	21.67184
1999	27.51854
2000	30.50708
2001	29.86241
2002	31.241
2003	31.81972
2004	36.41233
2005	38.18049
2006	40.77878
2007	41.32041
2008	44.44237
2009	48.46463
2010	52.51084
2011	53.95139
2012	56.77379
2013	52.42885
2014	52.08325
2015	45.58732
2017	42.29117
2018	42.8463