Year	%
1998	97.12019
1999	97.55176
2000	97.38769
2001	98.87515
2002	98.55883
2003	98.22453
2004	97.87571
2005	98.30874
2006	98.14936
2007	98.71911
2008	98.57096
2009	98.7782
2010	98.68454
2011	98.91449
2013	99.02707
2014	99.26875
2015	99.42044
2016	99.49038