Year	Percent change
1980	7.55
1981	-1.184
1982	5.443
1983	-6.077
1984	6.706
1985	10.474
1986	13.034
1987	-6.416
1988	-3.254
1989	1.178
1990	3.548
1991	-1.889
1992	-0.041
1993	5.125
1994	9.168
1995	9.336
1996	12.078
1997	10.649
1998	10.04
1999	-3.678
2000	1.412
2001	0.385
2002	1.763
2003	3.67
2004	11.905
2005	8.031
2006	10.854
2007	9.568
2008	2.726
2009	-11.624
2010	7.494
2011	4.453
2012	0.153
2013	3.344
2014	2.279
2015	2.541
2016	2.129
2017	2.613
2018	1.58
2019	2.679
2020	2.408
2021	2.412
2022	2.454
2023	2.328
2024	2.332