Year	%
1993	84.76604
1998	89.59337
1999	91.23421
2003	92.08404
2006	98.82658
2008	95.30032
2009	91.0564
2010	94.58919
2011	93.0053
2012	94.91685
2013	97.37323
2014	95.27411
2015	92.52574
2016	92.58356
2017	93.1639