Year	Percent
1992	96.13661
1993	96.19186
1994	98.25865
1995	98.30158
1996	96.78701
1997	95.72351
1998	98.03057
1999	97.54325
2000	96.26742
2001	100.13052
2002	97.50544
2003	98.38575
2004	96.92295
2005	92.67681
2006	93.2233
2007	95.03526
2008	97.41631
2009	99.15538
2010	99.06582
2011	96.09583
2012	93.1775
2013	94.56887
2014	96.29537
2015	95.98979