Year	Percent change
1980	5
1981	51.1
1982	6.6
1983	12.5
1984	-12.4
1985	-3.7
1986	1.9
1987	22.7
1988	6.336
1989	11.6
1990	21.4
1991	15.9
1992	8.8
1993	5.4
1994	20.3
1995	17.814
1996	10.623
1997	0.703
1998	-25.611
1999	-32.913
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