Year	Percent change
1981	-5.104
1982	9.004
1983	6.549
1984	42.477
1985	18.659
1986	-13.555
1987	-6.968
1988	-4.979
1989	0.127
1990	-3.686
1991	-3.083
1992	-15.751
1993	10.103
1994	6.077
1995	32.728
1996	-12.098
1997	11.859
1998	2.771
1999	8.11
2000	3.11
2001	80.288
2002	163.557
2003	-31.945
2004	50.816
2005	7.306
2006	40.622
2007	-4.06
2008	12.949
2009	3.58
2010	16.913
2011	8.229
2012	-1.12
2013	-2.164
2014	9.368
2015	-21.869
2016	-10.616
2017	3.008
2018	14.038
2019	-0.96
2020	7.615
2021	8.034
2022	13.424
2023	4.836
2024	4.104