Year	Percent change
1980	0.677
1981	-1.556
1982	-1.13
1983	-1.078
1984	2.007
1985	2.513
1986	0.515
1987	-2.257
1988	4.288
1989	3.799
1991	3.102
1992	0.697
1993	-1.599
1994	2
1995	2.1
1996	2.863
1997	4.484
1998	3.895
1999	3.072
2000	3.92
2001	4.132
2002	3.923
2003	5.795
2004	5.061
2005	0.599
2006	5.652
2007	3.274
2008	-0.335
2009	-4.301
2010	-5.478
2011	-9.132
2012	-7.3
2013	-3.242
2014	0.74
2015	-0.438
2016	-0.191
2017	1.505
2018	2.098
2019	2.404
2020	2.158
2021	1.632
2022	1.216
2023	1.238
2024	1.168