Year	%
2001	9.29
2002	7.74
2004	8.09
2005	3.71
2006	4.45
2007	5.76
2008	3.59
2009	3.39
2010	2.92
2011	2.22
2012	2.07
2013	7.14
2014	2.26
2015	1.21
2016	3.96
2017	1.92
2018	1.94
2019	1.94
2020	1.74
2021	2.38