Year	Percent change
1980	5.145
1981	16.419
1982	-28.784
1983	-34.211
1984	-14.975
1985	-23.865
1986	26.144
1987	-9.376
1988	24.986
1989	-2.03
1990	24.396
1991	30.27
1992	0.85
1993	-1.966
1994	0.222
1995	3.89
1996	-0.611
1997	1.378
1998	1.222
1999	-10.487
2000	5.861
2001	-1.249
2002	-9.454
2003	21.731
2004	9.933
2005	6.382
2006	-0.028
2007	2.03
2008	4.073
2009	-9.858
2010	7.408
2011	10.865
2012	5.364
2013	1.551
2014	1.668
2015	2.796
2016	4.332
2017	-0.962
2018	8.153
2019	0.379
2020	0.766
2021	0.95
2022	1.758
2023	1.071
2024	1.506