Year	%
2008	5.45350630049101
2009	6.23096466231012
2010	6.78389119750208
2011	6.83583959729123
2012	7.4369887255935
2013	7.55530675097008
2014	7.16761401120425
2015	7.12183209283378
2016	7.64707124159309
2017	8.19395489709604
2018	7.91208376467566
2019	8.0079591051095
2020	7.61014587740305
2021	8.09058344861373