Year	Percent change
1980	9.3
1981	38.7
1982	1.2
1983	3.6
1984	-10.5
1985	2.1
1986	-4.9
1987	24.4
1988	-17.734
1989	14.4
1990	27.6
1991	14.9
1992	6.1
1993	4.7
1994	15.5
1995	20.27
1996	9.434
1997	0.674
1998	-12.5
1999	-24.103
2000	25.495
2001	-9.053
2002	2.359
2003	3.503
2004	14.113
2005	25.159
2006	-4.273
2007	6.894
2008	24.079
2009	-15.887
2010	19.468
2011	18.573
2012	14.414
2013	1.6
2014	-1.38
2015	-9.075
2016	2.081
2017	10.459
2018	12.97
2019	6.742
2020	8.426
2021	9.083
2022	6.602
2023	8.56
2024	8.22