Year	Percent change
1980	3.03
1981	-2.941
1982	3.03
1983	2.941
1984	-1.714
1985	-1.744
1986	2.959
1987	4.023
1988	-4.972
1989	-7.558
1990	-15.723
1991	4.478
1992	2.143
1993	0.914
1994	0.984
1995	1.359
1996	0.969
1997	1.077
1998	1.197
1999	1.369
2000	-5.98
2001	5.211
2002	8.06
2003	-26.017
2004	23.261
2005	-7.671
2006	4.61
2007	5.747
2008	4.662
2009	18.021
2010	18.565
2011	-24.548
2012	39.046
2013	-18.767
2014	26.768
2015	23.264
2016	2.414
2017	5.755
2018	22.135
2019	9.874
2020	6.636
2021	7.668
2022	7.203
2023	5.824
2024	5.696