Year	Percent
2000	-65.10345
2001	-38.69429
2002	-35.98763
2003	-36.87079
2004	-44.78369
2005	-34.07966
2006	-37.32185
2007	-30.97488
2008	-34.10008
2009	-24.70972
2010	-27.25818
2011	-28.10798
2012	-25.98684
2013	-25.2116
2014	-28.43277
2015	-13.66289
2016	-18.12446
2017	-26.20274