Ngo-2021, ingeniso yentengiso yoshishino lweentsimbi ezingasebenziyo idlule kwi-7 yetriliyoni zeeyuan, urhwebo lokungenisa elizweni kunye norhwebo lokuthumela ngaphandle lulonke lwafikelela kuma-261.62 eebhiliyoni zeedola zaseMelika, ukusebenza komsebenzi kufikelele kwirekhodi eliphezulu, kwaye isicwangciso seminyaka emihlanu se-14 siphumeze isiqalo esihle.