Year	Percent change
1997	-29.053
1998	32.38
1999	-37.998
2000	35.649
2001	-50.031
2002	-24.842
2003	9.332
2004	25.79
2005	32.573
2006	3.256
2007	78.71
2008	14.37
2009	-15.161
2010	35.36
2011	8.539
2012	-9.744
2013	14.815
2014	23.176
2015	-2.91
2016	-0.66
2017	9.523
2018	-8.758
2019	-5.012
2020	14.27
2021	7.333
2022	1.731
2023	1.288
2024	-0.171