Year	Percent
1990	2.174
1991	2.857
1992	3.125
1993	3.333
1994	3.333
1995	2.5243
1996	2.9113
1998	2.5141
2000	3.9335
2001	3.9969
2005	0.8839
2006	1.1776
2007	1.3382
2008	0.7324
2009	1.5972
2010	0.531
2011	0.4589
2012	0.6066
2013	0.9809
2014	0.7638
2015	1.0667
2016	1.1469
2017	1.3327