Year	Percent change
1997	7.161
1998	3.564
1999	19.144
2000	3.988
2001	4.719
2002	5.607
2003	4.762
2004	5.656
2005	8.247
2006	9.161
2007	9.245
2008	9.999
2009	1.728
2010	7.111
2011	8.543
2012	-0.944
2013	-0.512
2014	3.069
2015	4.004
2016	2.135
2017	6.035
2018	2.615
2019	2.513
2020	3.007
2021	2.985
2022	3.03
2023	3
2024	3