Year	% net
1989	84.78893
1990	84.8464
1991	85.21871
1992	86.40441
1993	90.51508
1994	93.74604
1995	95.58239
1996	97.48614
1997	98.01003
1999	96.09932
2000	95.51994
2001	94.91041
2002	97.39371
2003	98.32237
2004	98.71966
2005	99.83487
2006	99.55568
2007	98.45967
2008	97.11186
2009	95.06724
2010	93.07121
2011	91.5596
2012	92.53922
2013	94.47021
2014	96.67425
2015	99.64163
2016	99.06336