Year	%
2002	2.24
2003	1.84
2004	1.89
2005	1.54
2006	1.61
2007	2.03
2008	1.63
2009	1.36
2010	1.29
2011	1.29
2012	1.46
2013	1.58
2014	1.43
2015	1.49
2016	2.08
2017	1.78
2018	2.26
2019	1.72