Year	% net
1999	43.96131
2000	44.93905
2002	56.68525
2004	54.48868
2005	58.64749
2007	68.56765
2008	66.83578
2009	68.28458
2010	68.20751
2011	67.72275
2012	68.32101
2013	70.05065
2014	71.36837
2015	72.32872
2016	73.23349
2017	74.18809
2018	74.54667