Year	%
1983	-20.403528358428517
1984	-2.682174748161138
1985	-43.72230139973649
1986	-43.807804463853174
1987	-52.07387466774476
1988	-53.44428082257499
1989	-35.01874021402804
1990	-3.9572097639338675
1991	6.663524969551884
1992	-4.106292761974281
1994	13.021918874971352
1995	9.861413113062326
1996	15.034247243088481
1997	17.726870569955587
1998	11.100686077835134
1999	21.686831649297755
2000	10.621614269514064
2001	17.334495674894775
2002	22.99559283604617
2003	10.329038732164111
2004	4.339243938569238
2005	21.765552288592787
2006	15.909004356418588
2007	10.980623543664596
2008	13.242970296250173
2009	-34.743442958837576
2010	13.761214649189688
2011	11.37349893076152
2012	21.488079144860603
2013	19.014630018503684
2014	15.677384119663811
2015	16.554664604145685
2016	18.233393726757317
2017	15.890847111454171
2018	14.747868803936367