Year	% net
1992	21.08537
1993	20.97949
1994	21.29584
1995	21.90584
1996	22.03123
1997	21.92206
1998	22.65442
1999	22.82332
2000	23.90375
2001	24.68033
2002	25.8845
2003	27.48508
2004	28.80116
2005	29.97463
2006	31.54751
2007	32.41725
2008	34.09588
2009	34.78683
2010	35.71122
2011	36.5166
2012	37.07681
2013	35.63686
2014	35.89404
2015	36.52726
2016	36.09562
2017	36.10381
2018	36.1417