Year	Percent change
1980	-5.444
1981	21.299
1982	-16.182
1983	8.183
1984	12.424
1985	-6.128
1986	25.887
1987	-0.988
1988	-14.82
1989	-0.061
1990	6.889
1991	-4.815
1992	7.72
1993	-9.957
1994	-60.261
1995	21.34
1996	39.357
1997	13.374
1998	-12.454
1999	15.655
2000	-3.531
2001	20.465
2002	7.849
2003	3.659
2004	28.25
2005	13.494
2006	12.501
2007	25.475
2008	-3.112
2009	-20.159
2010	11.592
2011	19.808
2012	21.247
2013	9.616
2014	8.561
2015	-3.752
2016	9.78
2017	40.688
2018	10.445
2019	10.5
2020	8.842
2021	11.645
2022	9.148
2023	10.314
2024	8.713