Year	Percent change
1980	-15.913
1981	-32.025
1982	0.614
1983	-1.729
1984	-7.703
1985	-3.383
1986	16.73
1987	-26.272
1988	20.77
1989	20.199
1990	19.981
1991	-19.156
1992	-6.95
1993	-6.959
1994	-6.433
1995	26.051
1996	-15.456
1997	2.87
1998	-7.447
1999	2.279
2000	2.143
2001	-5.156
2002	-16.385
2003	29.391
2004	10.337
2005	9.104
2006	9.179
2007	3.44
2008	-6.528
2009	-7.437
2010	-0.677
2011	-68.933
2012	217.17
2013	-23.911
2014	-54.737
2015	4.47
2016	3.934
2017	72.205
2018	34.68
2019	-23.136
2020	-4.908
2021	-3.983
2022	-0.951
2023	0.051
2024	0.167