Year	Percent change
1981	-24.957
1982	-0.184
1983	-5.026
1984	8.596
1985	-13.116
1986	9.857
1987	-2.487
1988	-15.29
1989	11.835
1990	-2.114
1991	4.562
1992	-2.443
1993	4.968
1994	23.6
1995	4.642
1996	-3.357
1997	-30.627
1998	12.929
1999	24.168
2000	2.502
2001	34.299
2002	-7.726
2003	-17.921
2004	-12.519
2005	70.05
2006	-3.14
2007	12.547
2008	1.145
2009	-10.27
2010	-11.3
2011	9.402
2012	2.953
2013	10.377
2014	8.426
2015	7.09
2016	-8.726
2017	5.162
2018	-4.971
2019	15.833
2020	6.358
2021	3.879
2022	3.934
2023	4.341
2024	4.002