Year	% net
1987	9.99632
1994	23.59279
2002	55.19301
2003	54.34976
2004	53.56755
2005	56.28987
2006	56.15032
2007	57.8988
2009	60.33153
2012	64.81515
2013	66.0983
2014	66.40214
2015	67.71739
2016	67.57609
2017	67.50024
2018	66.42105