Year	Percent change
1980	0.606
1981	-20.04
1982	1.518
1983	-4.709
1984	-8.306
1985	0.607
1986	-11.353
1987	-14.702
1988	7.579
1989	7.199
1990	3.72
1991	15.655
1992	-2.712
1993	-3.763
1994	1.935
1995	-12.397
1996	2.633
1997	-0.607
1998	-0.377
1999	0.462
2000	3.681
2001	-1.764
2002	-0.959
2003	13.016
2004	4.461
2005	11.87
2006	6.5
2007	6.354
2008	2.666
2009	-2.988
2010	3.176
2011	-66.657
2012	124.709
2013	-36.829
2014	-53.017
2015	-13.023
2016	-7.389
2017	64.014
2018	17.879
2019	4.27
2020	1.401
2021	1.437
2022	1.473
2023	1.51
2024	1.547