Year	% net
1992	8.19887
1993	8.18943
1994	7.92485
1995	8.15739
1999	3.27577
2000	3.88762
2001	4.15927
2002	5.08476
2004	4.66727
2005	7.96448
2006	9.92302
2007	11.69815
2008	13.34227
2009	15.66697
2010	16.98501
2011	17.78469
2012	17.9889
2013	20.45359
2014	20.58412
2015	19.23149