Year	% net
1974	1.39895
1976	1.68804
1977	2.11378
1978	2.53561
1979	3.06804
1981	3.50079
1990	5.36037
1991	5.78795
1997	5.4615
1999	5.38559
2001	5.28282
2002	5.50642
2003	6.13784
2004	7.51201
2005	8.52719
2007	8.86268
2008	9.46457
2009	9.59377
2010	10.86772
2011	11.53509
2014	15.15304
2015	16.63379
2017	20.06691