Year	Percent change
1980	-2.004
1981	7.229
1982	-33.315
1983	-10.636
1984	-12.714
1985	21.465
1986	5.917
1987	-10.972
1988	-11.155
1989	-5.429
1990	-5.107
1991	-19.127
1992	17.999
1993	49.806
1994	2.975
1995	-1.169
1996	7.6
1997	13.637
1998	6.535
1999	-10.167
2000	-8.141
2001	4.792
2002	-4.488
2003	-6.106
2004	-2.202
2005	5.243
2006	1.771
2007	8.744
2008	2.085
2009	11.348
2010	4.61
2011	5.303
2012	13.455
2013	-6.64
2014	-2.401
2015	14.271
2016	4.74
2017	2.231
2018	-2.573
2019	12.738
2020	24.286
2021	17.295
2022	9.798
2023	17.004
2024	7.17