Year	Percent change
1980	7.1
1981	-2.9
1982	6.3
1983	6.8
1984	2.4
1985	4.1
1986	2.6
1987	3.7
1988	2.255
1989	2.3
1990	1.052
1991	-4.182
1992	-3.826
1993	0.308
1994	3.149
1995	4.379
1996	4.224
1997	4.946
1998	4.716
1999	7.144
2000	4.149
2001	2.626
2002	2.705
2003	-1.265
2004	0.883
2005	3.395
2006	2.517
2007	1.446
2008	-2.324
2009	-4.175
2010	1.539
2011	0.613
2012	3.087
2013	-0.41
2014	-0.148
2015	1.045
2016	-1.69
2017	1.437
2018	2.3
2019	2.1
2020	1.6
2021	1.5
2022	1.5
2023	1.5
2024	1.5