Year	%
1993	4.88
1996	4.82
2001	13.2
2002	13.28
2003	13.3
2004	13.24
2005	13.29
2006	13.14
2007	12.9
2008	12.9
2009	12.82
2010	12.68
2011	12.58
2012	12.62
2013	12.62
2014	12.68
2015	12.14
2016	11.74
2017	12.3
2018	11.93
2019	11.65
2020	11.66
2021	11.66