Year	Percent change
1980	9.255
1981	1.929
1982	1.682
1983	-2
1984	0.4
1985	4.327
1986	2.748
1987	-2.074
1988	3.428
1989	-2.849
1990	8.976
1991	4.226
1992	2.958
1993	5.836
1994	2.02
1995	6.045
1996	4.324
1997	5.735
1998	3.961
1999	4.358
2000	5.85
2001	5.335
2002	4.64
2003	3.448
2004	4.426
2005	1.719
2006	3.939
2007	5.983
2008	4.901
2009	2.326
2010	2.11
2011	2.96
2012	4.814
2013	7.196
2014	6.352
2015	2.097
2016	3.969
2017	5.831
2018	6.545
2019	6.454
2020	6.526
2021	6.527
2022	6.508
2023	6.483
2024	6.54