Year	% net
1992	14.79937
1993	14.79945
1994	15.10326
1995	15.49938
1996	15.52114
1997	15.57631
1998	16.21013
1999	16.75426
2000	17.42459
2001	17.95761
2002	18.72361
2003	19.40317
2004	20.51107
2005	21.72503
2006	23.21675
2007	24.70388
2008	26.41139
2009	27.64159
2010	28.896
2011	29.74624
2012	30.5583
2013	30.81079
2014	31.47466
2015	32.43202
2016	32.2428
2017	32.53769
2018	32.8487