Year	Percent change
1980	4.622
1981	-12.975
1982	-15.185
1983	-8.705
1984	-51.631
1985	-34.913
1986	15.627
1987	14.363
1988	-10.578
1989	22.892
1990	14.057
1991	-49.24
1992	84.089
1993	14.195
1994	45.543
1995	34.237
1996	8.828
1997	-2.789
1998	3.568
1999	2.937
2000	1.334
2001	6.072
2002	-1.988
2003	21.308
2004	6.126
2005	8.682
2006	20.166
2007	15.049
2008	-7.314
2009	-8.739
2010	-21.496
2011	-0.029
2012	13.929
2013	4.745
2014	4.025
2015	3.363
2016	11.009
2017	10.274
2018	9.155
2019	3.576
2020	7.358
2021	6.228
2022	5.039
2023	4.676
2024	4.09