Year	% net
1992	16.60082
1993	16.63517
1994	16.83279
1995	17.07103
1996	16.98697
1997	16.89631
1998	17.24552
1999	17.49563
2000	18.21793
2001	19.08439
2002	19.95081
2003	20.95861
2004	22.32802
2005	23.10283
2006	23.89674
2007	24.44371
2008	26.63833
2009	28.33974
2010	30.06803
2011	30.25196
2012	30.51339
2013	31.63519
2014	32.22259
2015	32.96741
2016	33.74958
2017	34.67489
2018	35.01341