Year	%
1986	86.74282
1987	87.95995
1988	89.42824
1989	89.50516
1990	90.63437
1992	92.90178
1993	94.17928
2000	92.73008
2001	92.88215
2002	98.4986
2003	98.3064
2004	95.97476
2005	94.2212
2006	96.08703
2007	96.79583
2008	100
2009	96.68214
2010	97.75681
2011	97.24289
2016	96.93179