Year	Percent change
1980	-8.995
1981	1.293
1982	-13.122
1983	1.904
1984	-6.066
1985	-18.742
1986	19.132
1987	1.105
1988	6.709
1989	24.61
1990	11.068
1991	7.294
1992	1.113
1993	5.305
1994	15.097
1995	9.118
1996	4.069
1997	-2.11
1998	0
1999	0.314
2000	4.908
2001	2.521
2002	5.248
2003	6.454
2004	6.469
2005	6.903
2006	-9.949
2007	-15.911
2008	29.124
2009	6.47
2010	28.526
2011	-25.99
2012	25.81
2013	6.646
2014	10.855
2015	-14.682
2016	40.523
2017	-3.142
2018	0.906
2019	9.239
2020	6.021
2021	6.381
2022	6.702
2023	5.111
2024	6.748