Year	Percent
1993	0.81226
1994	0.49338
1995	0.45437
1996	0.50398
1997	0.74711
1998	1.22925
1999	0.9701
2000	1.2167
2001	1.36194
2002	1.27129
2003	1.12123
2004	1.19594
2005	1.16221
2006	1.16393
2007	1.11248
2008	1.13036
2009	1.08128
2010	0.87885
2011	0.79176
2012	0.76669
2013	0.76372
2014	0.87939
2015	1.13821
2016	1.48871
2017	1.74849