Year	Percent change
1980	1.423
1981	8.282
1982	13.485
1983	6.664
1984	4.708
1985	-0.759
1986	2.916
1987	6.051
1988	5.808
1989	12.144
1990	4.331
1991	2.668
1992	14.722
1993	11.25
1994	12.563
1995	13.133
1996	6.359
1997	11.495
1998	3.889
1999	4.87
2000	16.038
2001	2.28
2002	17.205
2003	12.382
2004	15.147
2005	11.52
2006	10.262
2007	17.872
2008	1.587
2009	-0.536
2010	24.908
2011	12.327
2012	0.935
2013	7.665
2014	4.94
2015	-6.987
2016	7.92
2017	5.273
2018	10
2019	8
2020	8
2021	8
2022	8.5
2023	8.5
2024	8.5