However, it is important to note that it is extremely difficult to make an accurate estimate of the true revenue from oil, as they rely on black market sales that are difficult to trace.
ومع ذلك فمن الصعب إجراء تقدير دقيق لإيرادات النفط حيث أن التنظيم يعتمد على مبيعات السوق السوداء التي يصعب تعقبها.