Year	Percent change
1980	13.342
1981	29.56
1982	28.946
1983	2.209
1984	32.654
1985	-7.034
1986	4.218
1987	-1.831
1988	12.375
1989	0.866
1990	17.419
1991	-5.248
1992	-1.049
1993	-7.682
1994	14.737
1995	11.782
1996	0.173
1997	23.85
1998	-16.34
1999	29.913
2000	0.855
2001	-4.344
2002	7.346
2003	-7
2004	7.389
2005	18.191
2006	3.133
2007	8.481
2008	-2.48
2009	-37.671
2010	16.024
2011	27.546
2012	17.841
2013	37.802
2014	7.735
2015	-16.284
2016	1.019
2017	-12.838
2018	5.368
2019	1.443
2020	3.402
2021	2.403
2022	3.32
2023	9.786
2024	1.102