Year	%
2000	2.68
2001	3.43
2002	2.31
2003	2.19
2004	2.21
2005	2.35
2006	2.35
2007	2.22
2008	2.08
2009	2.1
2010	2.52
2011	1.98
2012	1.98
2013	1.94
2014	2.44
2015	2.4
2016	2.16
2017	2.21
2018	2.01
2019	2.11
2020	1.82
2021	0.77