Year	Percent change
1980	9.582
1981	-5.893
1982	-1.704
1983	7.095
1984	2.953
1985	16.119
1986	4.161
1987	1.382
1988	-3.919
1989	3.002
1990	0.923
1991	-16.776
1992	-3.095
1993	14.834
1994	1.908
1995	0.942
1996	2.06
1997	1.726
1998	1.308
1999	18.166
2000	10.459
2001	-12.924
2002	9.681
2003	-3.858
2004	7.062
2005	9.142
2006	0.385
2007	5.506
2008	-4.133
2009	-20.575
2010	2.144
2011	-0.74
2012	9.083
2013	-0.979
2014	-2.054
2015	-9.351
2016	5.005
2017	-0.968
2018	4.577
2019	2.91
2020	3.436
2021	2.308
2022	2.174
2023	2.227
2024	2.35