Year	% net
1999	57.1753
2000	60.16414
2001	61.89531
2003	69.34685
2005	66.33888
2006	66.93905
2007	66.44766
2008	66.04449
2009	66.30209
2010	66.26234
2011	67.60589
2012	68.82564
2013	71.07215
2014	71.28572
2015	71.03463
2016	73.67771
2017	72.70522
2018	73.35268