Year	Percent change
1987	-1.803
1988	-3.447
1989	-0.189
1990	-7.999
1991	36.307
1992	6.083
1993	54.617
1994	48.1
1996	13.172
1997	11.428
1998	50.137
1999	34.817
2000	9.341
2001	16.775
2002	13.281
2003	4.812
2004	6.552
2005	4.706
2006	10.501
2007	-11.39
2008	-7.623
2009	10.011
2010	8.385
2011	8.343
2012	7.896
2013	12.734
2014	7.171
2015	10.575
2016	12.6
2017	10.728
2018	10.701
2019	8.866
2020	8.345
2021	8.273
2022	8.128
2023	7.713
2024	7.489