Year	Percent change
1980	-30.889
1981	-26.392
1982	-28.848
1983	18.463
1984	9.826
1985	-8.841
1986	12.303
1987	5.33
1988	-16.727
1989	55.04
1990	-45.4
1991	-81.784
1992	611.282
1993	52.554
1994	5.237
1995	7.53
1996	-0.494
1997	0.402
1998	2.592
1999	-14.316
2000	8.988
2001	-0.667
2002	-11.955
2003	31.408
2004	8.129
2005	8.787
2006	7.746
2007	-0.254
2008	2.21
2009	-6.344
2010	-0.497
2011	14.262
2012	7.687
2013	-3.993
2014	1.405
2015	-0.868
2016	2.461
2017	-3.262
2018	0.95
2019	1.92
2020	2.432
2021	2.432
2022	1.866
2023	1.865
2024	1.863