Year	% net
1987	24.33258
1988	24.63089
1989	24.1272
1994	15.57176
1995	17.27408
1996	20.31181
1998	26.74153
1999	29.31976
2000	34.19589
2001	38.47082
2002	40.92992
2003	42.06247
2004	45.83056
2005	57.21244
2006	62.51473
2007	67.71243
2008	73.47839
2009	73.60342
2010	71.4706
2011	75.02156
2012	76.32373
2014	82.17773
2015	81.45238