Year	%
1993	4.88
1996	4.79
2001	14.98
2002	15.41
2003	15.32
2004	15.85
2005	15.76
2006	15.37
2007	15.28
2008	15.28
2009	15.1
2010	15.15
2011	15.08
2012	14.69
2013	14.69
2014	14.57
2015	15.58
2016	15.43
2017	17.59
2018	16.95
2019	15.6
2020	15.54
2021	15.54