Year	% net
1998	58.43602
1999	59.7904
2000	60.85877
2001	61.86262
2002	62.31728
2003	64.14999
2004	66.18073
2005	67.58032
2006	68.95015
2007	71.2119
2008	71.30023
2009	73.31767
2010	75.45379
2011	77.17245
2012	76.99241
2013	77.8683
2014	80.6408
2015	80.49991
2016	80.645
2017	80.38369
2018	80.90978