Year	%
1994	80.66696
1995	86.94325
1996	87.23623
1997	86.07253
1998	84.86347
1999	86.15017
2000	87.48576
2001	88.94945
2002	90.30226
2003	91.63388
2004	91.47999
2005	94.15888
2006	96.62684
2007	95.91327
2008	96.36167
2009	95.51469
2010	94.91898
2013	93.65777
2014	96.39394
2015	96.85535
2016	97.09356
2017	97.12934