Year	Percent change
1980	13.2
1981	12.7
1982	1.8
1983	-17.4
1984	-2.4
1985	-3.5
1986	-5.8
1987	7.7
1988	10.7
1989	16.9
1990	8.6
1991	-11.195
1992	19.88
1993	-5.076
1994	7.194
1995	33.938
1996	19.538
1997	-10.999
1998	-14.458
1999	-18.517
2000	27.453
2001	25.644
2002	29.672
2003	17.975
2004	17.758
2005	9.512
2006	-2.083
2007	-0.413
2008	-2.592
2009	-3.705
2010	6.771
2011	8.141
2012	2.164
2013	4.128
2014	11.547
2015	14.451
2016	-1.04
2017	-8.763
2018	3.246
2019	5.898
2020	5.734
2021	6.089
2022	6.251
2023	6.677
2024	3.377