Year	Percent
1995	-8.61212
1996	-18.64989
1997	-19.49928
1998	-26.50996
1999	-15.3333
2000	-25.65372
2001	-23.68138
2002	-25.19349
2003	-33.76543
2004	-31.29359
2005	-40.52745
2006	-46.64171
2007	-49.68838
2008	-52.78449
2009	-36.61908
2010	-39.32
2011	-40.85851
2012	-40.45892
2013	-37.25201
2014	-36.99331
2015	-31.05887
2016	-27.93965
2017	-28.12528