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	19.522
1993	0.45
1994	-0.6
1995	18.8
1996	2.508
1997	12.788
1998	-1.87
1999	-8.592
2000	-17.161
2001	1.215
2002	8.858
2003	6.462
2004	24.508
2005	9.086
2006	7.663
2007	19.623
2008	2.478
2009	-11.716
2010	11.046
2011	12.576
2012	2.036
2013	9.641
2014	3.125
2015	5.737
2016	8.107
2017	5.774
2018	-1.401
2019	3.475
2020	4.358
2021	3.9
2022	3.59
2023	3.484
2024	3.458