Year	Percent change
1980	-8.878
1981	55.946
1982	-36.071
1983	25.226
1984	75.304
1985	-21.217
1986	1.981
1987	-2.986
1988	19.542
1989	8.651
1990	12.295
1991	1.136
1992	-2.961
1993	-9.84
1994	-60.358
1996	-2.731
1997	28.81
1998	3.337
1999	-30.732
2000	5.456
2001	-7.689
2002	10.019
2003	158.828
2004	301.35
2005	1.677
2006	-9.057
2007	-5.028
2008	-9.209
2009	-8.841
2010	-0.739
2011	-1.845
2012	-8.317
2013	-14.48
2014	5.651
2015	30.823
2016	-4.026
2017	-14.839
2018	9.073
2019	10.309
2020	16.823
2021	7.84
2022	10.683
2023	4.572
2024	3.355