Year	Percent
1993	0.80484
1994	0.8776
1995	1.00425
1996	0.97639
1997	1.24275
1998	1.8582
1999	2.9534
2000	3.26694
2001	3.05566
2002	2.6913
2003	2.99984
2004	3.03039
2005	3.07586
2006	2.90849
2007	2.0586
2008	1.6275
2009	1.8521
2010	2.32626
2011	2.06665
2012	2.21316
2013	2.33871
2014	1.99545
2015	1.73591
2016	1.24745
2017	0.86044