Year	%
2005	4.2
2007	3.69
2008	3.62
2009	3.62
2011	3.87
2012	3.53
2013	3.61
2014	3.21
2015	2.99
2016	2.82
2017	4.75
2018	4.4
2019	3.94
2020	3.28
2021	2.63