Year	Percent change
1980	-6.588
1981	17.669
1982	6.867
1983	-27.426
1984	-44.407
1985	-32.411
1986	2.321
1987	5.486
1988	10.117
1989	-8.755
1990	-10.133
1991	8.637
1992	7.95
1993	31.423
1994	43.308
1995	23.571
1996	5.785
1997	4.505
1998	16.395
1999	0.685
2000	1.773
2001	19.367
2002	13.424
2003	12.428
2004	0.014
2005	3.086
2006	11.637
2007	18.482
2008	-4.006
2009	7.638
2010	-16.005
2011	-0.265
2012	6.109
2013	10.837
2014	11.163
2015	14.636
2016	12.248
2017	7.287
2018	-0.361
2019	8.526
2020	4.929
2021	5.541
2022	5.266
2023	5.665
2024	3.002