Year	Percent change
1980	1.814
1981	-11.768
1982	0.894
1983	-7.751
1984	-4.334
1985	10.743
1986	0.505
1987	-9.208
1988	10.322
1989	4.184
1990	0.735
1991	-22.997
1992	16.95
1993	-9.543
1994	5.937
1995	15.802
1996	-18.965
1997	12.734
1998	-15.207
1999	14.934
2000	15.931
2001	-13.14
2002	28.422
2003	73.672
2004	-10.214
2005	31.765
2006	-10.348
2007	-10.222
2008	13.768
2009	-10.455
2010	18.438
2011	2.327
2012	0.923
2013	0.395
2014	-4.47
2015	-9.358
2016	-15.483
2017	36.773
2018	4.087
2019	0.968
2020	2.17
2021	2.823
2022	2.649
2023	1.507
2024	1.194