Year	Percent change
1980	3.299
1981	-4.542
1982	-11.557
1983	3.229
1984	2.419
1985	3.243
1986	6.104
1987	2.479
1988	0.054
1989	10.692
1990	9.31
1991	7.68
1992	-1.562
1993	3.561
1994	3.802
1995	2.997
1996	7.281
1997	4.797
1998	2.926
1999	6.245
2000	-0.061
2001	15.376
2002	3.106
2003	9.119
2004	1.56
2005	6.535
2006	4.662
2007	3.494
2008	4.773
2009	4.679
2010	5.413
2011	3.241
2012	-0.837
2013	2.304
2014	7.076
2015	6.17
2016	5.765
2017	5.401
2018	4.9
2019	5
2020	4.9
2021	4.8
2022	4.8
2023	4.8
2024	4.8