Year	%
2002	3.98
2003	4.92
2004	4.92
2005	4.92
2006	4.86
2007	4.7
2008	4.7
2009	4.7
2010	4.69
2011	4.69
2012	4.63
2013	4.63
2014	4.62
2015	4.63
2016	4.63
2017	4.64
2018	4.64
2019	4.65
2020	4.64
2021	4.64