Year	Percent change (Units)
2003	34.048
2004	-2.825
2005	51.498
2006	-0.770
2007	-15.539
2008	-3.338
2009	28.855
2010	33.083
2011	7.674
2012	36.242
2013	7.503
2014	-16.014
2015	24.731
2016	-8.259
2017	1.936
2018	-7.879
2019	-5.731
2020	-2.479