Year	% net
1999	53.18786
2000	54.84529
2001	53.97559
2002	52.98472
2003	56.58969
2004	63.90916
2005	61.57834
2006	61.27996
2007	71.65181
2008	77.02734
2009	80.17601
2010	82.10624
2011	79.89336
2012	79.72333
2013	79.63795
2015	81.5955
2016	76.91772
2017	79.77105
2018	80.91649