Year	%
2002	6.01
2003	4.73
2004	5.57
2005	5.11
2006	5
2007	5.14
2008	3.74
2009	3.59
2010	3.84
2011	3.35
2012	3.06
2013	3.64
2014	3.69
2015	3.51
2016	3.73
2017	4.46
2018	4.3
2019	4.22