Year	%
2008	2.82208199288245
2009	4.08301602290229
2010	4.70497582133693
2011	4.53797781890379
2012	4.92137936955479
2013	4.79348889261062
2014	4.61948181975495
2015	4.16510529138445
2016	3.93108996669006
2017	3.83219672759303
2018	3.86657827897154
2019	3.81150994513216
2020	3.71722963023515
2021	2.85023106835435