Year	% net
1998	83.90858
1999	84.78601
2000	85.62221
2001	86.4974
2002	86.77323
2003	84.00337
2004	84.8016
2005	84.92386
2006	84.14853
2007	84.22973
2008	83.2109
2009	82.4107
2010	82.92028
2011	84.86736
2012	85.98767
2013	88.84642
2014	89.77371
2015	89.90543
2016	88.87107
2017	87.85868