Year	Percent change
1980	9.892
1981	0.872
1982	-5.091
1983	7.786
1984	12.239
1985	-6.422
1986	24.081
1987	31.524
1988	26.371
1989	2.802
1990	5.13
1991	15.55
1992	9.614
1993	6.948
1994	6.974
1995	11.843
1996	5.63
1997	15.323
1998	6.754
1999	5.7
2000	18.406
2001	-15.911
2002	7.041
2003	9.099
2004	19.213
2005	3.726
2006	6.589
2007	2.942
2008	-2.677
2009	-14.439
2010	30.326
2011	0.462
2012	19.578
2013	1.08
2014	0.541
2015	-1.688
2016	-6.68
2017	6.169
2018	0.088
2019	1.726
2020	4.162
2021	1.931
2022	1.672
2023	1.686
2024	1.686