Year	Percent change
1987	5.365
1988	84.893
1989	54.964
1990	12.215
1991	139.68
1992	14.639
1993	1.785
1994	94.3
1996	-46.991
1997	163.229
1998	-5.499
1999	21.981
2000	24.968
2001	23.738
2002	9.437
2003	8.264
2004	21.837
2005	8.77
2006	18.772
2007	-3.062
2008	2.175
2009	-4.96
2010	33.854
2011	15.848
2012	25.981
2013	16.35
2014	13.853
2015	12.707
2016	15.298
2017	10.398
2018	16.593
2019	13.564
2020	10.884
2021	11.092
2022	10.911
2023	10.593
2024	10.215