Year	Percent change
1998	7.52
1999	8.998
2000	2.203
2001	5.539
2002	0.315
2003	3.9
2004	4.565
2005	2.426
2006	3.826
2007	7.103
2008	-0.53
2009	-10.335
2010	-5.437
2011	-8.334
2012	-7.022
2013	-0.834
2014	-0.702
2015	2.496
2016	2.459
2017	0.602
2018	1.13
2019	0.787
2020	0.699
2021	0.599
2022	0.499
2023	0.499
2024	0.499