Year	Percent change
1980	-10.962
1981	21.239
1982	5.199
1983	-9.443
1984	20.44
1985	4.346
1986	-10.577
1987	-3.891
1988	3.36
1989	10.286
1990	18.074
1991	4.875
1992	10.292
1993	-1.365
1994	-1.12
1995	11.019
1996	-4.534
1997	1.876
1998	18.99
1999	4.933
2000	7.983
2001	10.47
2002	1.731
2003	6.868
2004	8.336
2005	13.886
2006	6.284
2007	17.432
2008	18.786
2009	-1.563
2010	-4.45
2011	9.753
2012	5.495
2013	-0.419
2014	3.439
2015	1.762
2016	12.647
2017	6.833
2018	6.802
2019	4.738
2020	4.807
2021	5.471
2022	5.714
2023	6.559
2024	-1.427