Year	%
1992	88.98553
1993	90.17988
1994	90.38721
1995	90.74484
1996	92.60402
1997	93.50122
1998	94.32451
1999	94.96596
2000	95.32603
2001	94.41674
2002	94.81419
2003	96.62728
2004	97.53516
2005	98.73195
2006	98.86341
2007	98.8682
2008	98.94216
2009	99.13509
2010	99.2721
2011	99.12506
2012	96.58248
2013	98.1012
2014	98.44966
2015	99.444
2016	99.54916
2017	99.57045