Year	Percent change
1980	0.954
1981	-3.973
1982	-23.684
1983	-0.945
1984	3.17
1985	7.134
1986	-6.862
1987	0.112
1988	-2.668
1989	-2.992
1990	-12.606
1991	31.949
1992	24.984
1993	27.416
1994	6.798
1995	8.127
1996	12.772
1997	-2.604
1998	14.595
1999	3.293
2000	7.41
2001	-0.656
2002	0.6
2003	-6.656
2004	-0.979
2005	-14.482
2006	-9.935
2007	6.323
2008	-12.209
2009	-2.815
2010	2.498
2011	8.002
2012	13.541
2013	-3.332
2014	0.796
2015	6.899
2016	17.589
2017	3.167
2018	2.329
2019	7.609
2020	66.164
2021	41.16
2022	18.027
2023	44.356
2024	24.181