Year	Percent
1995	0.58379
1996	0.54266
1997	0.66763
1998	0.91504
1999	1.06698
2000	1.14684
2001	1.02409
2002	1.49484
2003	1.69673
2004	1.84641
2005	1.55498
2006	1.52852
2007	1.1815
2008	0.87496
2009	1.21474
2010	1.16429
2011	0.83699
2012	0.87174
2013	0.75724
2014	0.63822
2015	0.58786
2016	0.52353
2017	0.40824