Year	Percent change
1980	-5
1981	-3.3
1982	-21.5
1983	-17.4
1984	30.4
1985	-14.5
1986	-25.7
1987	16.8
1988	2.1
1989	-5.6
1990	12.9
1991	-14.257
1992	42.589
1993	-23.32
1994	-19.574
1995	15.717
1996	11.645
1997	39.356
1998	-15.434
1999	56.08
2000	1.023
2001	2.037
2002	5.055
2003	32.941
2004	-3.648
2005	38.303
2006	-1.258
2007	42.85
2008	36.353
2009	18.12
2010	-31.762
2011	8.131
2012	21.764
2013	12.947
2014	10.881
2015	-20.228
2016	-32.336
2017	3.753
2018	13.738
2019	-9.512
2020	0.791
2021	0.912
2022	4.821
2023	1.175
2024	2.947