Year	Percent change
1980	6.3
1981	-24.8
1982	-25
1983	12
1984	15.2
1985	-4.8
1986	14.8
1987	-5.9
1988	26.3
1989	11
1990	1.4
1991	14.7
1992	12.5
1993	4.6
1994	11.4
1995	8.2
1996	0.9
1997	13.4
1998	15.2
1999	-25.711
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