Year	Percent change
1980	0
1981	0
1982	0
1983	0
1984	0
1986	-11.442
1987	-6.597
1988	3.35
1989	-0.481
1990	1.138
1991	7.492
1992	3.627
1993	-1.256
1994	3.723
1995	8.035
1996	-7.047
1997	-1.805
1998	-6.434
1999	10.806
2000	12.731
2001	-2.397
2002	7.93
2003	2.541
2004	-3.044
2005	-2.941
2006	4.81
2007	-9.018
2008	-7.442
2009	-7.282
2010	11.89
2011	-5.068
2012	-2.494
2013	-9.799
2014	4.641
2015	-16.896
2016	-0.644
2017	-3.078
2018	-1.788
2019	38.598
2020	43.147
2021	1.945
2022	0.728
2023	1.254
2024	-0.363