Year	Percent change
1980	-17.413
1981	6.488
1982	-3.596
1983	-7.643
1984	31.382
1985	-17.431
1986	-38.691
1987	34.76
1988	7.995
1989	-11.331
1990	-16.368
1991	-2.119
1992	4.1
1993	0.6
1995	12.9
1996	-3.2
1997	10
1998	-2.5
1999	-5.8
2000	15.068
2001	17.565
2002	18.342
2003	13.253
2004	39.497
2005	11.569
2006	8.644
2007	42.525
2008	3.473
2009	-12.111
2010	22.889
2011	19.856
2012	3.025
2013	11.847
2014	1.352
2015	6.728
2016	7.941
2017	8.262
2018	-2.547
2019	3.834
2020	4.802
2021	4.291
2022	3.945
2023	3.824
2024	3.791