Year	Percent change
1980	-14.8
1981	-9.8
1982	-6.3
1983	1.3
1984	3.709
1985	21.111
1986	12.708
1987	11.897
1988	9.107
1989	9.075
1990	10.522
1991	20.542
1992	7.263
1993	18.379
1994	6.745
1995	7.181
1996	8.023
1997	1.241
1998	21.297
1999	12.805
2000	-0.14
2001	-5.204
2002	-1.914
2003	-1.539
2004	8.582
2005	1.49
2006	10.123
2007	5.989
2008	8.184
2009	-0.028
2010	13.676
2011	39.705
2012	5.853
2013	9.7
2014	3.227
2015	-8.657
2016	5.746
2017	32.531
2018	1.142
2019	10.029
2020	3.887
2021	0.905
2022	0.765
2023	2.327
2024	-1.035