Year	Percent
2000	1.69759
2001	1.38442
2002	1.466
2003	1.40002
2004	2.04218
2005	1.75321
2006	1.5591
2007	1.4628
2008	1.44962
2009	1.74327
2010	1.84937
2011	1.72228
2012	1.80569
2013	1.76709
2014	1.63458
2015	1.42043
2016	1.21538
2017	1.29773