Year	%
1993	17.77
1998	12.6
1999	13.03
2000	13.4
2001	13.09
2002	13.43
2003	14.52
2004	15.46
2005	13.47
2006	13.59
2007	14.07
2008	14.15
2009	14.52
2010	13.66
2011	14.62
2012	13.79
2013	14.24
2014	15.11
2015	15.08
2016	15.03
2017	15.16
2018	13.47
2019	13.39
2020	12.79
2021	13.21