Year	%
2003	0.91
2004	0.84
2005	1.43
2006	1.78
2007	2.27
2008	1.88
2009	2.01
2010	1.74
2011	1.72
2012	1.57
2013	1.71
2014	1.91
2015	2.14
2016	1.96
2017	1.41
2018	2.87