Year	% net
1999	43.44949
2000	44.56588
2001	44.60337
2002	45.42052
2003	46.66862
2004	47.83838
2005	48.64878
2006	49.5757
2007	51.47186
2008	52.4789
2009	52.02336
2010	53.46305
2011	54.78844
2012	55.65607
2013	57.17299
2014	57.47975
2015	57.68747
2016	58.29042
2017	59.50636
2018	60.08144