Year	%
2001	2.05
2002	1.75
2003	1.97
2004	2.09
2005	2.13
2006	1.93
2007	1.81
2008	2.08
2009	1.67
2010	1.86
2011	1.51
2012	1.94
2013	1.49
2015	1.84
2017	1.95
2018	1.91