Year	Percent
1994	-70.95065
1995	-51.05613
1996	-60.26463
1997	-44.96369
1998	-71.06021
1999	-66.5327
2000	-46.80993
2001	-47.5339
2002	-46.58194
2003	-52.87914
2004	-45.25348
2005	-39.99485
2006	-27.99573
2007	-29.35311
2008	-32.46674
2009	-23.72874
2010	-21.57713
2011	-23.7644
2012	-23.5064
2013	-20.39137
2014	-22.58201
2015	-18.65302
2016	-16.8824
2017	-14.98651