Year	Percent change
1981	-10.152
1982	-3.126
1983	5.579
1984	10.343
1985	-22.469
1986	-4.591
1987	-15.943
1988	-7.02
1989	13.665
1990	44.265
1991	2.347
1992	2.752
1993	2.099
1994	1.17
1995	-0.286
1996	26.188
1997	20.669
1998	-7.888
1999	8.057
2000	25.216
2001	9.163
2002	10.477
2003	20.679
2004	57.913
2005	-4.322
2006	-3.921
2007	17.183
2008	5.428
2009	4.314
2010	15.739
2011	0.895
2012	-12.55
2013	15.6
2014	6.523
2015	-2.717
2016	4.941
2017	-1.086
2018	2.899
2019	3.346
2020	11.487
2021	6.231
2022	6.93
2023	12.433
2024	11.596