Year	% net
1999	31.73723
2000	32.14966
2001	30.42478
2002	31.88805
2003	32.85822
2005	36.65545
2006	38.06956
2007	43.33563
2008	44.01556
2009	42.53878
2013	52.66323
2014	52.13977
2015	55.58338
2016	55.43891
2017	55.4414
2018	58.2609
2019	57.24406