Year	annual %
2004	1.43083868527342
2005	1.68548890528348
2006	2.09525935611432
2007	2.49894575725803
2008	4.29320249287704
2009	2.19959237046011
2010	2.58541815582589
2011	2.89979584300091
2012	2.8273322422262
2013	1.60439298078063
2014	1.11296303373832
2015	0.145686073240975
2016	0.573948019802681
2017	1.04597683468917