Year	Percent change
1980	-4.286
1981	2.531
1982	-17.676
1983	11.722
1984	20.725
1985	9.25
1986	6.857
1987	5.204
1988	13.365
1989	4.719
1990	0.476
1991	2.25
1992	6.187
1993	8.68
1994	10.691
1995	7.141
1996	5.354
1997	16.676
1998	6.239
1999	8.602
2000	8.843
2001	-5.231
2002	1.638
2003	3.367
2004	8.557
2005	7.578
2006	5.424
2007	5.503
2008	0.283
2009	-14.337
2010	14.005
2011	5.905
2012	3.357
2013	2.413
2014	2.558
2015	0.304
2016	-0.354
2017	4.643
2018	3.329
2019	-0.007
2020	2.064
2021	2.216
2022	2.063
2023	1.997
2024	2.018