Year	Percent change
1980	11
1981	-0.844
1982	-8.491
1983	10.146
1984	-14.743
1985	-21.024
1986	11.835
1987	4.09
1988	-4.383
1989	16.026
1990	9.374
1991	12.713
1992	21.745
1993	7.113
1994	-3.1
1995	12.436
1996	5.93
1997	3.437
1998	22.098
1999	1.218
2000	-0.529
2001	16.018
2002	-6.079
2003	17.314
2004	-7.836
2005	-7.267
2006	1.194
2007	4.979
2008	-18.608
2009	10.543
2010	-5.366
2011	-16.922
2012	0.356
2013	-3.943
2014	6.653
2015	14.87
2016	9.826
2017	-7.954
2018	0.344
2019	5.683
2020	1.472
2021	1.378
2022	5.179
2023	7.51
2024	6.474