Year	Percent change
1980	9.317
1981	-1.636
1982	-2.302
1983	-3.337
1984	0.473
1985	-4.628
1986	7.845
1987	10.512
1988	17.036
1989	10.906
1990	7.735
1991	-7.558
1992	18.919
1993	-10.878
1994	7.042
1995	-20.225
1996	3.059
1997	3.517
1998	1.85
1999	8.931
2000	10.456
2001	2.177
2002	-4.093
2003	-1.394
2004	2.49
2005	2.051
2006	1.268
2007	5.28
2008	-0.65
2009	-4.689
2010	4.534
2011	5.723
2012	-2.687
2013	2.08
2014	4.268
2015	5.187
2016	4.58
2017	5.994
2018	3.285
2019	-1.36
2020	4.745
2021	3.5
2022	3.5
2023	3.5
2024	3.5