Year	Percent change
1980	-9.821
1981	6.186
1982	35.031
1983	-22.33
1984	-18.579
1985	-0.388
1986	-15.253
1987	-11.392
1988	-6.153
1989	4.89
1990	-6.35
1991	3.209
1992	12.935
1993	-3.756
1994	-1.983
1995	25.402
1996	13.967
1997	33.096
1998	0.323
1999	-4.908
2000	-3.849
2001	20.307
2002	12.945
2003	11.95
2004	16.267
2005	63.826
2006	55.857
2007	35.378
2008	6.922
2009	-4.484
2010	-13.376
2011	16.698
2012	16.248
2013	7.195
2014	1.046
2015	-0.104
2016	17.12
2017	-7.073
2018	4.32
2019	1.209
2020	1.294
2021	2.169
2022	6.699
2023	-4.866
2024	-0.232