Year	%
1993	15.5
1997	16.93
1998	17.26
2001	15.16
2002	12.99
2003	11.97
2005	11.66
2006	11.93
2007	11.47
2008	11.37
2009	11.93
2014	12.52
2015	12.02
2016	12.6
2017	12.69
2018	13.57
2019	13.59
2020	13.75
2021	13.75