 Bloomberg Billionaires Index itangaza ko kugeza ubu muri uyu mwaka, abaherwe 500 ba mbere ku isi bamaze guhomba agera kuri miliyari 553 zamadolari yAmerika Abashoramari mu rwego rwibikomoka kuri peteroli ndetse no muri gas barahombye cyane kubera ko ibiciro byaguye kubera igabanuka ryababicyeneye ku isi. 