Year	Percent change
1980	16.1
1981	7.7
1982	5.486
1983	6.311
1984	5.442
1985	4.491
1986	6.607
1987	-10.211
1988	1.135
1989	5.609
1990	3.951
1991	6.077
1992	4.217
1993	6.109
1994	4
1995	4.1
1996	-1.667
1997	2.554
1998	3.668
1999	1.755
2000	0.377
2001	6.002
2002	3.176
2003	1.633
2004	-0.74
2005	-0.351
2006	-0.997
2007	3.593
2008	13.665
2009	9.816
2010	-3.9
2011	1.497
2012	-3.046
2013	-1.488
2014	2.104
2015	0.572
2016	1.917
2017	0.356
2018	1.864
2019	2.106
2020	2.475
2021	2.451
2022	2.51
2023	2.543
2024	2.579