Year	Percent change
1980	20
1981	19.3
1982	-16.4
1983	-10.7
1984	-3.2
1985	-5.9
1986	-2.7
1987	6.9
1988	-6.2
1989	-4.4
1990	-5.8
1991	-5.2
1992	9.7
1993	-7.488
1994	-6.495
1995	15.6
1996	26.942
1997	-5.219
1998	14.822
1999	-13.922
2000	41.473
2001	-0.884
2002	-10.862
2003	11.881
2004	6.207
2005	-2.638
2006	2.415
2007	-1.565
2008	-3.993
2009	19.081
2010	20.494
2011	-12.703
2012	23.917
2013	8.578
2014	11.109
2015	-4.47
2016	-2.007
2017	15.984
2018	2.401
2019	11.087
2020	10.239
2021	5.377
2022	66.999
2023	18.316
2024	4.334