Year	%
2001	2.38
2003	2.31
2004	2.31
2005	2.31
2006	2.26
2007	2.24
2008	2.23
2009	2.29
2010	2.29
2011	2.38
2012	2.95
2013	2.95
2014	2.97
2015	6.59
2016	5.7
2017	5.45
2018	5.83
2019	7.23
2020	5.85
2021	6.43