Year	Percent
1997	94.58227
1998	98.63518
1999	99.21912
2000	97.702
2001	95.66929
2002	97.27964
2003	102.22076
2004	113.68442
2008	97.4367
2009	95.86993
2010	97.64533
2011	96.21478
2012	101.58303
2013	98.66696
2014	99.5097
2015	97.51492