Year	% net
1999	60.90379
2000	62.29479
2001	60.86982
2002	60.42583
2003	63.7075
2004	62.68135
2005	68.03964
2006	68.6966
2007	76.97758
2008	79.70525
2009	82.4496
2010	82.5328
2011	81.23662
2012	80.93965
2013	80.11243
2015	80.79577
2016	78.60232
2017	80.81903
2018	81.31252