Year	Percent change
1981	0.795
1982	4.059
1983	-6.067
1984	10.265
1985	1.151
1986	0.414
1987	-1.339
1988	3.445
1989	-0.202
1990	1.112
1991	2.1
1992	2.51
1993	2.888
1994	54.008
1995	3.124
1996	6.914
1997	2.435
1998	6.404
1999	-3.259
2000	9.841
2001	2.318
2002	1.247
2003	0.758
2004	2.668
2005	3.709
2006	5.264
2007	0.286
2008	8.377
2009	-0.459
2010	4.018
2011	1.827
2012	6.77
2013	-1.838
2014	-0.761
2015	2.301
2016	-2.652
2017	2.982
2018	0.968
2019	1.969
2020	1.919
2021	1.919
2022	1.919
2023	1.919
2024	1.919