Year	% net
1999	72.25958
2000	72.88529
2001	72.84139
2002	76.14784
2003	79.1488
2004	82.88043
2005	83.78993
2006	84.36834
2007	83.98923
2008	83.67184
2009	82.54576
2010	80.46017
2011	77.61434
2012	78.28871
2013	78.23902
2014	78.55702
2015	80.08355
2016	81.38706
2017	83.33499
2018	83.37074