Year	Percent change
1980	-0.51
1981	5.105
1982	2.114
1983	4.059
1984	8.01
1985	12.59
1986	14.402
1987	3.924
1988	13.899
1989	8.983
1990	9.89
1991	0.376
1992	7.952
1993	0.583
1994	1.599
1995	1.749
1996	2.922
1997	-0.694
1998	6.286
1999	2.67
2000	0.049
2001	-3.409
2002	0.417
2003	4.264
2004	7.268
2005	-0.411
2006	6.196
2007	2.068
2008	4.977
2009	-1.454
2010	0.304
2011	4.139
2012	-0.314
2013	-1.995
2014	0.005
2015	0.271
2016	3.891
2017	3.672
2018	0.988
2019	3.319
2020	2.726
2021	2.109
2022	1.539
2023	1.484
2024	1.478