Year	Percent
1993	0.7353
1994	0.83876
1995	0.80566
1996	0.63914
1997	0.58212
1998	0.58785
1999	0.75094
2000	0.88171
2001	1.04154
2002	1.54221
2003	1.61002
2004	1.59566
2005	1.61062
2006	1.71502
2007	1.55807
2008	1.63441
2009	1.39006
2010	1.09266
2011	1.04272
2012	0.90927
2013	0.93739
2014	0.94376
2015	1.05024
2016	1.4795
2017	1.72165