Year	Percent change
1980	6.552
1981	32.65
1982	2.37
1983	-6.747
1984	-8.867
1985	-23.273
1986	-25.941
1987	-10.042
1988	-16.917
1989	14.054
1990	8.366
1991	42.951
1992	-3.004
1993	-18.737
1994	-23.758
1995	7.385
1996	9.134
1997	10.428
1998	-9.815
1999	3.108
2000	18.493
2001	-5.812
2002	4.021
2003	5.095
2004	11.834
2005	24.768
2006	19.079
2007	21.111
2008	13.701
2009	-4.573
2010	-0.212
2011	5.675
2012	8.206
2013	11.163
2014	15.196
2015	1.067
2016	-16.201
2017	0.331
2018	6.107
2019	3.429
2020	2.814
2021	3.077
2022	2.811
2023	3.106
2024	3.295