Year	Percent change
1987	-31.248
1988	23
1989	63.8
1990	141.8
1991	191
1992	75
1993	114.319
1994	10.44
1995	10.077
1996	7.147
1997	10.503
1998	12.899
1999	1.996
2000	-0.826
2001	-0.117
2002	-0.036
2003	1.027
2004	3.925
2005	6.349
2006	6.143
2007	7.668
2008	24.997
2009	-0.663
2010	3.997
2011	5.478
2012	2.925
2013	2.955
2014	3.852
2015	1.225
2016	3.025
2017	2.906
2018	2.387
2019	2.542
2020	2.833
2021	2.965
2022	3
2023	3
2024	3