Year	Percent change
1980	-5.996
1981	-21.497
1982	1.437
1983	39.276
1984	-25.398
1985	1.736
1986	-2.625
1987	244.205
1988	110.298
1989	9.831
1990	0.207
1991	-11.866
1992	-1.681
1993	9.47
1994	5.545
1995	-4.828
1996	69.169
1997	22.831
1998	23.045
1999	8.759
2000	14.589
2001	18.223
2002	9.184
2003	13.091
2004	-7.443
2005	1.218
2006	10.222
2007	-10.327
2008	-4.254
2009	12.219
2010	-16.557
2011	6.105
2012	14.902
2013	14.937
2014	-12.367
2015	-0.493
2016	11.748
2017	9.569
2018	-4.737
2019	7.177
2020	8.134
2021	8.089
2022	1.932
2023	3.308
2024	3.364