Year	Percent change
1980	6.3
1981	-24.8
1982	-25
1983	12
1984	15.2
1985	-3.1
1986	13.9
1987	21.9
1988	1.1
1989	10.4
1990	0.4
1991	19.9
1992	15.2
1993	3.3
1994	13.7
1995	7.7
1996	5.5
1997	23.8
1998	8.9
1999	-9.401
2000	17.851
2001	-8.105
2002	2.613
2003	1.661
2004	5.666
2005	11.118
2006	5.78
2007	3.841
2008	12.553
2009	-7.318
2010	12.21
2011	15.257
2012	0.029
2013	0.056
2014	-1.886
2015	-6.115
2016	1.124
2017	13.361
2018	3.708
2019	6.259
2020	9.012
2021	8.646
2022	8.48
2023	9.475
2024	8.243