Year	Percent
2000	1.23688
2001	0.7746
2003	0.83248
2004	0.67032
2005	0.46638
2006	0.49724
2007	0.35214
2008	0.30626
2009	0.40751
2010	0.32438
2011	0.27334
2012	0.21562
2013	0.21614
2014	0.21728
2015	0.36134
2016	0.66834
2017	0.53814