Year	Percent change
1988	-5.296
1989	5.257
1990	52.884
1991	-1.654
1992	6.768
1993	34.748
1994	-20.406
1995	27.613
1996	20.572
1997	21.145
1998	0.885
1999	-2.553
2000	27.092
2001	-24.656
2002	17.394
2003	17.818
2004	20.863
2005	12.209
2006	7.508
2007	13.273
2008	-0.616
2009	-11.83
2010	17.448
2011	11.413
2012	1.325
2013	8.656
2014	-0.419
2015	1.235
2016	4.686
2017	8.892
2018	-9.187
2019	-7.197
2020	7.8
2021	7.734
2022	6.994
2023	6.5
2024	5.976