Year	% net
1994	41.51897
1995	42.10724
1996	42.65316
1999	43.36455
2000	44.71883
2001	45.48601
2002	46.83975
2003	48.40217
2004	49.63541
2005	50.70762
2006	52.05767
2007	53.93973
2008	55.10672
2009	55.18157
2010	56.88916
2011	58.92174
2012	60.30106
2013	61.58025
2014	62.1179
2015	62.53617
2016	62.77726
2017	63.76386
2018	64.08017