Year	Percent change
1980	10.631
1981	3
1982	-7.8
1983	0
1984	1.5
1985	-2.5
1986	-4.5
1987	-7.5
1988	3.8
1989	26.5
1990	-8.2
1991	-4.3
1992	8.6
1993	2.6
1994	22.7
1995	17.1
1996	-6.6
1997	12.269
1998	10.949
1999	21.133
2000	-6.664
2001	13.172
2002	23.366
2003	21.632
2004	13.217
2005	-5.015
2006	22.202
2007	22.976
2008	12.154
2009	-9.361
2010	-0.505
2011	13.134
2012	-12.724
2013	-3.01
2014	10.47
2015	-23.136
2016	18.609
2017	16.102
2018	11.539
2019	5.49
2020	9.515
2021	8.23
2022	8.668
2023	8.247
2024	8.788