Year	% of revenue
1991	1.1299308113936561
1992	1.5748611861824973
1993	1.0781256016325902
1994	1.2401538366616622
1995	0.9979620564321281
1996	3.1606962010410045
1997	2.057930502674828
1998	0.2472964014582567
1999	1.0277629786554248
2011	0.0005195313459498688
2012	3.5698817758071364E-06
2014	0.055977950244997014
2015	0.21372850068868987
2016	1.2484489664354048
2017	0.9160931928524076
2019	1.0559668935829694
2020	1.1262990287742436
2021	1.0747816715234806