Year	Percent change
1980	-0.8
1981	-22.4
1982	9.6
1983	-24.4
1984	-23.1
1985	27
1986	-24.6
1987	13.7
1988	-9.8
1989	-3.3
1990	-18.9
1991	-14.4
1992	-4.7
1993	1.387
1994	9.317
1995	-9.8
1996	14.691
1997	-5.656
1998	35.301
1999	-8.3
2000	7.902
2001	3.687
2002	0.958
2003	17.183
2004	1.089
2005	20.869
2006	-3.362
2007	8.617
2008	25.435
2009	51.339
2010	20.241
2011	-11.15
2012	-2.815
2013	1.399
2014	5.285
2015	7.468
2016	-14.298
2017	7.331
2018	6.731
2019	23.987
2020	14.076
2021	-6.718
2022	3.125
2023	4.478
2024	5.427