Year	Percent change
1980	2.405
1981	0.945
1982	-0.454
1983	1.41
1984	4.844
1985	0.464
1986	4.72
1987	2.671
1988	0.465
1989	-1.26
1990	-6.568
1991	-8.445
1992	-10.462
1993	-13.468
1994	-6.144
1995	2.762
1996	-1.935
1997	-7.84
1998	-3.875
1999	-3.802
2000	-8.136
2001	-2.1
2002	2.948
2003	5.578
2004	6.738
2005	6.135
2006	5.321
2007	6.256
2008	6.23
2009	2.855
2010	7.108
2011	6.874
2012	7.088
2013	8.482
2014	9.47
2015	6.916
2016	2.4
2017	3.433
2018	3.948
2019	4.339
2020	4.409
2021	4.477
2022	4.619
2023	4.724
2024	4.867