Year	Percent change
1980	10.261
1981	15.072
1982	-0.635
1983	16.742
1984	9.413
1985	-7.633
1986	-1.83
1987	-16.467
1988	5.104
1989	16.727
1990	-1.238
1991	31.645
1992	-46.241
1993	12.646
1994	10.841
1995	20.296
1996	2.619
1997	25.171
1998	15.547
1999	2.508
2000	-5.721
2001	-2.361
2002	0.308
2003	4.752
2004	12.089
2005	2.404
2006	-1.584
2007	-0.3
2008	-4.702
2009	-16.983
2010	0.916
2011	2.602
2012	-3.348
2013	2.174
2014	0.707
2015	6.892
2016	7.4
2017	-6.09
2018	-3.003
2019	2.334
2020	2.64
2021	3.757
2022	3.692
2023	3.711
2024	3.973