In 1965, the oil fields in Baku were producing 21.5 million tons of oil annually; by 1988, that number had dropped down to almost 3.3 million.
En 1965, os campos petroleiros de Bakú producían 21,5 millóns de toneladas de petróleo anualmente, mentres que en 1988 o número reduciuse a case 3,3 millóns.