Year	%
1993	18.92
1997	19.51
1998	18.68
2001	17.29
2002	13.05
2003	12.49
2005	11.97
2006	12.2
2007	11.79
2008	12.11
2009	12.18
2014	12.73
2015	12.09
2016	12.67
2017	13.16
2018	14.19
2019	14.2
2020	14.42
2021	14.42