Year	Percent
2000	1.58281
2001	1.3537
2002	1.45672
2003	1.40303
2004	1.51899
2005	2.15178
2006	1.94343
2007	2.03978
2008	2.53765
2009	2.04711
2010	1.85637
2011	1.60657
2012	1.36787
2013	1.35722
2014	1.29222
2015	1.55858
2016	0.94923
2017	0.86413