Year	Percent change
1988	20.805
1989	18.749
1990	21.216
1991	-19.241
1992	-6.902
1993	-7.263
1994	-6.589
1995	25.909
1996	-15.505
1997	2.893
1998	-7.178
1999	2.318
2000	2.708
2001	-4.815
2002	-14.069
2003	28.47
2004	8.631
2005	8.659
2006	7.854
2007	3.443
2008	-6.557
2009	-6.819
2010	-0.838
2011	-69.154
2012	217.46
2013	-23.803
2014	-54.729
2015	8.67
2016	0.73
2017	71.135
2018	34.772
2019	-23.087
2020	-4.732
2021	-3.958
2022	-0.916
2023	-0.008
2024	0.156