Year	Percent change
1980	-8.265
1981	16.79
1982	4.907
1983	2.457
1984	-6.029
1985	12.32
1986	-3.551
1987	-6.972
1988	-6.324
1989	9.688
1990	5.024
1991	2.181
1992	-16.937
1993	-3.382
1994	-8.591
1995	14.372
1996	-2.849
1997	-10.669
1998	20.207
1999	-3.427
2000	-17.548
2001	1.935
2002	14.689
2003	24.991
2004	19.712
2005	5.752
2006	-6.085
2007	33.525
2008	27.464
2009	-7.833
2010	-5.618
2011	14.16
2012	4.77
2013	5.498
2014	4.122
2015	-3.068
2016	2.644
2017	21.28
2018	10.586
2019	5.406
2020	15.988
2021	10.428
2022	5.585
2023	6.604
2024	5.418