Year	% net
1983	88.77666
1984	87.32153
1985	97.74957
1990	98.26091
1991	99.64743
1992	99.66632
1994	96.60036
1999	95.35541
2000	81.85025
2001	88.7281
2002	93.48189
2003	95.21401
2005	89.76744
2006	88.73293
2007	96.55137
2009	93.49986
2011	90.92355
2012	91.81669
2013	94.10986
2014	91.05875