Year	Percent change
1980	0.624
1981	-4.186
1982	-2.612
1983	-0.182
1984	1.754
1985	10.796
1986	-3.233
1987	5.731
1988	8.798
1989	0.039
1990	-0.72
1991	0.305
1992	6.454
1993	11.041
1994	1.192
1995	10.52
1996	5.372
1997	5.151
1998	1.98
1999	1.385
2000	8.947
2001	0.815
2002	-0.809
2003	-1.761
2004	4.158
2005	8.802
2006	6.986
2007	7.459
2008	2.036
2009	-18.517
2010	8.702
2011	4.025
2012	-0.256
2013	4.161
2014	3.206
2015	3.381
2016	0.557
2017	0.855
2018	1.38
2019	2.425
2020	3.28
2021	3.47
2022	3.612
2023	3.565
2024	3.565