Year	%
1993	18.83
1997	19.51
1998	18.68
2001	17.29
2002	13.05
2003	12.49
2005	10.55
2006	10.1
2007	9.95
2008	9.6
2009	9.48
2014	7.66
2015	7.66
2016	8.36
2017	9.25
2018	10.03
2019	10.04
2020	10.26
2021	10.42