Year	Percent change
1980	-20.364
1981	-18.921
1982	-9.504
1983	5.253
1984	5.24
1985	-4.258
1986	8.565
1987	8.142
1988	-10.05
1989	25.896
1990	-26.229
1991	-41.008
1992	82.809
1993	35.132
1994	8.616
1995	1.669
1996	0.598
1997	2.493
1998	3.654
1999	-1.789
2000	4.691
2001	0.209
2002	3.014
2003	17.337
2004	10.762
2005	10.076
2006	7.52
2007	5.992
2008	2.48
2009	-7.076
2010	-2.371
2011	9.628
2012	6.625
2013	1.151
2014	0.5
2015	0.593
2016	2.926
2017	-3.482
2018	1.74
2019	2.453
2020	2.928
2021	2.888
2022	2.52
2023	2.741
2024	2.88