Year	Percent change
1980	3.03
1981	0.52
1982	-29.336
1983	-6.946
1984	-10.342
1985	15.874
1986	2.17
1987	-9.41
1988	-8.573
1989	-4.178
1990	-2.865
1991	-15.797
1992	12.962
1993	53.691
1994	3.419
1995	3.432
1996	6.3
1997	12.887
1998	7.21
1999	-7.247
2000	-6.926
2001	4.901
2002	-2.984
2003	-9.85
2004	0.466
2005	0.8
2006	4.22
2007	7.941
2008	3.812
2009	10.088
2010	5.571
2011	5.53
2012	15.153
2013	-6.01
2014	-4.462
2015	17.925
2016	7.275
2017	3.098
2018	-5.55
2019	12.966
2020	20.064
2021	15.054
2022	9.114
2023	15.028
2024	7.253