Year	%
1993	20.39
1997	23.15
1998	22.15
2001	20.81
2002	19.75
2003	18.58
2005	15.92
2006	15.82
2007	16.89
2008	17.22
2009	14.53
2014	16.16
2015	15.72
2016	14.61
2017	14.52
2018	14.68
2019	14.72
2020	14.72
2021	14.95