“…A typical example of such studies are works of [14,15,18,20,21]. The authors in study [15] have shown the importance of the relationships between the container volumes and different macroeconomic variables. They have applied volumes of export and import containers, industrial production index, population, GDP, agricultural, industrial and service GDPs, GNP (gross national product), GNP per capita, and wholesale for the key factors in the analysis.…”