Year	% of revenue
1995	0.2923026956804157
1996	2.424433249370277
1997	0.8863819500402902
1998	0.7490636704119851
1999	1.7705698556762386
2009	0.15325443786982249
2010	0.07358615862304145
2012	3.482711285275549
2013	2.2249636658340153
2014	2.369917609698451
2015	1.4941205043031918
2016	1.3490709164862602
2017	1.5042019655398764
2018	1.4603019926728587
2019	1.3493928357676948
2020	1.2530852957837664
2021	1.0294035670482249