Year	Percent change
1980	5.299
1981	13.279
1982	-14.482
1983	9.233
1984	4.041
1985	-8.984
1986	50.122
1987	14.018
1988	21.488
1989	31.89
1990	-13.07
1991	-7.661
1992	-9.761
1993	-10.428
1994	-11.008
1995	-5.898
1996	-3.065
1997	32.336
1998	11.545
1999	-6.099
2000	-8.063
2001	-2.805
2002	3.219
2003	-6.587
2004	19.319
2005	-6.275
2006	-0.211
2007	27.113
2008	27.067
2009	-11.873
2010	7.212
2011	19.642
2012	43.501
2013	9.306
2014	0.411
2015	2.368
2016	-7.571
2017	-29.191
2018	10.192
2019	7.998
2020	6.981
2021	3.33
2022	4.336
2023	6.908
2024	2.825