Year	Percent change
1980	-2.039
1981	-13.006
1982	-16.845
1983	-3.362
1984	2.026
1985	1.54
1986	7.662
1987	-10.252
1988	18.94
1989	5.1
1990	0.491
1991	-2.016
1992	7.98
1993	-1.097
1994	-20.257
1995	28.355
1996	7.994
1997	0.996
1998	1.196
1999	-9.632
2000	7.006
2001	10.182
2002	4.05
2003	11.648
2004	10.632
2005	-0.432
2006	0.497
2007	4.721
2008	0.957
2009	-20.401
2010	19.872
2011	11.954
2012	10.335
2013	-1.222
2014	1.327
2015	5.374
2016	1.929
2017	6.952
2018	-1.169
2019	3.306
2020	3.453
2021	3.223
2022	3.818
2023	4.489
2024	3.98