Year	Percent change
1980	9.596
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	5.921
1993	0.445
1994	38.535
1995	14.458
1996	4.917
1997	3.803
1998	5.755
1999	0.348
2000	4.21
2001	3.981
2002	2.422
2003	1.507
2004	0.883
2005	5.364
2006	3.787
2007	1.294
2008	7.939
2009	0.398
2010	2.179
2011	2.736
2012	6.743
2013	0.969
2014	-1.083
2015	0.271
2016	-0.809
2017	0.144
2018	1.04
2019	2.049
2020	2.006
2021	2.013
2022	2.02
2023	2.027
2024	2.034