Year	% net
1998	17.79326
1999	19.61823
2000	22.06706
2001	24.15914
2005	33.86471
2006	36.80107
2008	44.05713
2009	45.84115
2010	50.06988
2011	51.61726
2012	55.06652
2013	58.16924
2014	61.73468
2015	63.7082
2016	64.54163
2017	67.06537
2018	70.19893