Year	%
2005	3.61
2007	3.02
2008	2.73
2009	2.73
2011	3.13
2012	4.05
2013	4.45
2014	3.52
2015	4.29
2016	3.85
2017	16.58
2018	19.42
2019	11.79
2020	5.16
2021	5.13