Year	%
1998	98.05798
1999	100
2000	99.37038
2004	99.36949
2005	98.54758
2006	96.60087
2007	96.92686
2008	95.40396
2009	94.39684
2010	94.06525
2011	92.08678
2012	90.57679
2013	88.60501
2014	87.73989
2015	87.06874
2016	90.41548