Year	Percent change
1980	7.056
1981	-1.797
1982	-1.67
1983	3.891
1984	0.17
1985	-3.132
1986	22.473
1987	6.023
1988	10.021
1989	3.792
1990	-6.786
1991	2.715
1992	9.934
1993	-12.797
1994	-1.983
1995	15.243
1996	5.27
1997	-4.378
1998	-16.133
1999	9.592
2000	-42.617
2001	-24.334
2002	9.583
2003	18.655
2004	21.025
2005	5.996
2006	0.314
2007	12.398
2008	22.818
2009	-21.204
2010	27.627
2011	49.101
2012	27.075
2013	1.547
2014	6.278
2015	2.235
2016	-6.687
2017	9.061
2018	6.141
2019	3.237
2020	2.247
2021	-1.547
2022	-0.666
2023	6.917
2024	17.569