Year	Percent change
1980	-4.718
1981	-23.107
1982	10.619
1983	7.181
1984	0
1985	9.896
1986	-15.934
1987	8.459
1988	5.401
1989	-3.277
1990	0.089
1991	-26.094
1992	-28.724
1993	-2.871
1994	12.612
1995	20.078
1996	-2.214
1997	-17.365
1998	4.916
1999	-19.493
2000	-6.078
2001	-34.852
2002	-31.462
2003	-3.861
2004	-21.868
2005	31.12
2006	-23.05
2007	74.044
2008	8.247
2009	-4.777
2010	61.131
2011	13.67
2012	-7.718
2013	40.652
2014	-4.97
2015	-5.308
2016	0.133
2017	-8.83
2018	-0.508
2019	11.466
2020	11.853
2021	7.546
2022	2.3
2023	2.349
2024	2.855