Year	Percent change
1980	-69.883
1981	-10.111
1982	135.474
1983	2.765
1984	-18.869
1985	-9.384
1986	-12.401
1987	27.568
1988	11.072
1989	7.881
1990	20.7
1991	10.682
1992	9.651
1993	15.793
1994	1.348
1995	-17.899
1996	-5.053
1997	-13.101
1998	8.559
1999	-1.627
2000	11.243
2001	-0.085
2002	3.458
2003	21.442
2004	2.84
2005	1.45
2006	-3.4
2007	-0.224
2008	-3.56
2009	7.316
2010	5.789
2011	5.895
2012	-28.271
2013	-1.429
2014	23.411
2015	47.879
2016	19.033
2017	1.57
2018	-14.412
2019	-22.597
2020	4.348
2021	-2.115
2022	1.313
2023	1.279
2024	2.129