Year	Percent change
1980	9.657
1981	19.719
1982	22.937
1983	10.09
1984	-6.409
1986	5.575
1987	-9.705
1988	-18.206
1989	-4.637
1990	4.453
1991	-0.245
1992	-8.784
1993	-5.915
1994	2.885
1995	-2.346
1996	10.215
1997	16.728
1998	9.3
1999	-0.2
2000	7.117
2001	2.024
2002	1.139
2003	-0.214
2004	8.941
2005	9.745
2006	9.584
2007	11.444
2008	8.476
2009	-10.437
2010	-1.926
2011	7.081
2012	4.537
2013	8.364
2014	10.339
2015	2.879
2016	-0.679
2017	-1.126
2018	5.781
2019	1.345
2020	2.198
2021	2.382
2022	2.915
2023	3.145
2024	2.928