Year	%
1985	37.66442
1986	36.53786
1987	38.85591
1988	39.65882
1989	39.43095
1990	42.20687
1991	45.55066
2003	95.99765
2004	95.72618
2005	97.1187
2006	97.71525
2007	97.65204
2008	98.62693
2010	100
2011	98.84116
2012	89.90143
2014	99.35761
2015	99.52535