Year	Percent change
1980	7.3
1981	5.533
1982	1.885
1983	-4.967
1984	-10.585
1985	-5.624
1986	29.5
1987	0.457
1988	0.842
1989	-6.52
1990	-17.1
1991	-27.8
1992	-8.1
1993	-0.9
1994	-16.276
1995	11.77
1996	24.662
1997	13.325
1998	29.87
1999	-22.744
2000	20.05
2001	4.519
2002	54.234
2003	-3.286
2004	30.061
2005	62.347
2006	14.098
2007	-2.42
2008	-6.057
2009	11.544
2010	5.347
2011	-15.891
2012	4.555
2013	6.707
2014	-5.36
2015	25.461
2016	-9.132
2017	7.421
2018	-28.015
2019	-7.296
2020	-2.417
2021	-0.52
2022	0.788
2023	0.842
2024	-0.417