Year	Percent change
1980	46.339
1981	-12.183
1982	-0.317
1983	-0.889
1984	-10.491
1985	50.368
1986	-12.134
1987	27.393
1988	3.162
1989	3.841
1990	-9.545
1991	-11.367
1992	-17.34
1993	1.09
1994	52.32
1995	25.873
1996	-7.502
1997	0.666
1998	18.639
1999	-0.558
2000	-8.598
2001	7.899
2002	5.967
2003	0.766
2004	8.475
2005	9.378
2006	6.11
2007	12.493
2008	30.979
2009	11.327
2010	-10.44
2011	1.023
2012	5.988
2013	0.776
2014	9.001
2015	14.455
2016	3.117
2017	1.717
2018	8.677
2019	9.854
2020	10.77
2021	6.211
2022	3.088
2023	1.75
2024	0.003