Year	%
2002	32.34
2003	24.55
2004	24.66
2005	24.77
2006	23.81
2007	29.84
2008	31.29
2009	31.17
2012	14.02
2015	11.7
2016	13.71
2017	20.27
2020	20.22
2021	18.87