Year	Percent change
1980	-10.239
1981	-5.991
1982	15.815
1983	-13.745
1984	10.267
1985	5.04
1986	-20.016
1987	-2.074
1988	-16.769
1989	29.832
1990	-6.379
1991	8.388
1992	2.21
1993	4.604
1994	19.421
1995	5.371
1996	15.174
1997	13.889
1998	-7.742
1999	13.494
2000	9.87
2001	4.877
2002	4.037
2003	8.147
2004	11.538
2005	14.47
2006	0.136
2007	1.308
2008	7.376
2009	0.717
2010	1.259
2011	5.689
2012	4.697
2013	-3.326
2014	-0.671
2015	2.269
2016	11.543
2017	8.09
2018	1.489
2019	3.686
2020	3.304
2021	3.316
2022	3.397
2023	3.418
2024	3.464