Year	%
2001	3.4
2003	3.75
2004	3.26
2005	3.19
2006	4.28
2007	3.01
2008	3.49
2009	3.52
2010	3.38
2011	3.44
2012	3.08
2013	2.99
2014	3.3
2015	3.93
2016	2.86
2017	3.86
2019	12.84
2020	4.72
2021	7.63