Year	%
2008	2.81942025282791
2009	4.02193112740747
2010	3.75857389340272
2011	4.29145434826523
2012	4.29452327369679
2013	4.49543407979547
2014	4.16249928399605
2015	4.0452542986778
2016	3.70275907528325
2017	3.12359565297023
2018	2.74834162277966
2019	2.47314366528244
2020	2.70533899736906
2021	2.42255628688584