Year	%
1992	94.95249
1993	95.40405
1994	95.08106
1995	95.28545
1996	96.45486
1997	96.59757
1998	96.96498
1999	97.27535
2000	97.79973
2001	96.9016
2002	96.8923
2003	97.76835
2004	98.29567
2005	98.76152
2006	98.70146
2007	98.59877
2008	98.44647
2009	98.36609
2010	98.41325
2011	98.54659
2012	97.59022
2013	98.18868
2014	98.28374
2015	98.66893
2016	98.64028
2017	98.79999