Year	Percent
1999	94.08518
2000	95.78964
2001	98.31212
2002	96.43714
2003	100.47188
2004	94.5191
2005	91.51249
2006	92.10816
2007	92.9572
2008	93.36371
2009	94.85888
2010	101.12132
2011	102.99155
2012	106.74157
2013	108.1874
2014	100.79391
2015	99.27234