Year	% of revenue
2014	10.762204081407452
2015	6.9514570912155325
2016	9.598250124588962
2017	10.190659730739549
2018	10.84540562301303
2019	12.049746473557994
2020	10.218341623325479
2021	10.944923260740827
2022	4.901851438768682
