Year	Percent change
1980	12.769
1981	-13.706
1982	-4.753
1983	4.175
1984	1.617
1985	4.584
1986	23.593
1987	6.82
1988	4.317
1989	6.705
1990	0
1991	245.354
1992	-6.72
1993	10.786
1994	-4.98
1995	10.983
1996	-9.06
1997	-4.527
1998	4.876
1999	6.392
2000	10.344
2001	4.762
2002	-1.587
2003	9.705
2004	-3.046
2005	4.639
2006	-4.607
2007	1.609
2008	17.143
2009	0.258
2010	-8.419
2011	6.699
2012	-12.19
2013	-8.895
2014	6.132
2015	19.264
2016	4.141
2017	71.478
2018	4.858
2019	10.114
2020	9.483
2021	5.942
2022	0.892
2023	1.048
2024	2.706