Year	Percent change
1980	9.666
1981	12.119
1982	-1.352
1983	-7.587
1984	-14.92
1985	-4.134
1986	-1.411
1987	0.878
1988	6.977
1989	19.8
1990	16
1991	17.123
1992	25.238
1993	15.323
1994	8.789
1995	1.036
1996	5.256
1997	18.091
1998	2.33
1999	-0.377
2000	9.908
2001	13.503
2002	10.995
2003	14.735
2004	27.3
2005	11.587
2006	7.211
2007	41.48
2008	23.294
2009	-13.867
2010	-3.124
2011	12.03
2012	10.064
2013	11.458
2014	5.079
2015	0.469
2016	3.982
2017	0.25
2018	-5.864
2019	0.545
2020	1.494
2021	-1.216
2022	-0.986
2023	-1.107
2024	-1.243