Year	% of revenue
2004	24.985629232264074
2005	19.7191447377084
2006	18.71477487526121
2007	9.970339714286455
2008	9.581961094434051
2009	8.0692850132755
2010	7.743520864163517
2011	7.66862227981102
2012	7.800953113326672
2013	8.105655095471194
2014	4.407515248180847
2015	7.854088608591579
2016	8.115887163685278
2017	9.857322614338687
2018	5.883925178381282
2019	0.9327547587997963
2020	0.21607100390939432
2021	0.2320151401576927
2022	0.355599978699207