Year	%
2002	20.23
2003	20.32
2005	19.74
2006	15.89
2007	14.1
2008	13.59
2009	14.91
2010	14.91
2011	11.67
2012	10.73
2013	10.76
2014	10.52
2015	8.86
2016	9.02
2018	10.36
2019	8.07
2020	10.77
2021	10.86