Year	%
2010	4.24664052157741
2011	4.00016076136015
2012	3.97136636161539
2013	3.68474668643624
2014	3.64473362976888
2015	4.28818093989301
2016	4.55842456604276
2017	4.80625264012661
2018	4.47240666716669
2019	4.60213145217644