Year	%
1993	4.88
1996	4.81
2001	13.42
2002	13.59
2003	13.59
2004	13.62
2005	13.64
2006	13.45
2007	13.22
2008	13.22
2009	13.13
2010	13.02
2011	12.94
2012	12.88
2013	12.88
2014	12.91
2015	12.55
2016	12.19
2017	12.84
2018	12.51
2019	12.13
2020	12.13
2021	12.13