Year	%
2003	5.5
2005	5.71
2006	5.69
2007	5.22
2008	6.05
2009	5.97
2011	4.83
2012	5.14
2013	5.14
2014	4.93
2015	5.16
2016	5.18
2017	6.68
2018	6.32
2019	6.29
2020	6.02
2021	6.06