Year	Percent
1990	100
1991	100
1992	100
1993	100
1994	100
1995	100
1996	100
1997	100
1998	100
1999	100
2000	97.9
2003	99
2004	95.7
2005	99.3
2006	98.5
2007	98.3
2008	97.2
2009	98.3
2010	98.6
2011	98.3
2012	98.7
2013	99.9
2014	97.4