Year	%
2002	27.92
2003	25.36
2004	25.4
2005	25.43
2006	29.04
2007	28.14
2008	27.26
2009	27.13
2012	19.32
2015	8.95
2016	8.63
2017	16.16
2020	19.1
2021	17.26