Year	Percent change (Units)
2000	-9.664
2001	-19.961
2002	13.699
2003	-3.103
2004	4.939
2005	3.602
2006	-9.339
2007	10.140
2008	-0.166
2009	-2.033
2010	9.962
2011	16.107
2012	1.008
2013	-0.716
2014	-11.993
2015	7.550
2016	11.107
2017	3.950
2018	-1.100
2019	2.251
2020	-3.217