Year	Percent change
1980	14.1
1981	-2.409
1982	-29.652
1983	-5.902
1984	18.591
1985	-6.604
1986	-23.329
1987	-15.046
1988	28.27
1989	3.689
1990	-8.881
1991	-20.494
1992	-9.962
1993	27.344
1994	11.374
1995	-5.891
1996	-20.666
1997	9.973
1998	-26.367
1999	-22.253
2000	-27.141
2001	-12.3
2002	-28.576
2003	-4.254
2004	17.835
2005	46.496
2006	40.79
2007	27.533
2008	-4.111
2009	-1.334
2010	44.304
2011	-1.881
2012	4.54
2013	11.866
2014	-1.75
2015	6.229
2016	3.54
2017	0.367
2018	4.771
2019	8.525
2020	4.121
2021	1.874
2022	2.123
2023	5.525
2024	10.839