Band 8+: The pie charts below show the different reasons for flight delays in a particular Asian country in 2015 and 2016. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The provided pie charts illustrate the distribution of various factors leading to flight delays in a specific Asian country during the years 2015 and 2016.

Overall, the predominant cause of flight delays in both years was airline operations management, with a notable decrease in delays attributed to air traffic control from 2015 to 2016.

In 2015, airline operations management accounted for 40% of delays, followed by air traffic control at 25% and bad weather at 21%. Military factors and airport security constituted 10% and 4% of delays, respectively. These three major factors, airline operations management, air traffic control, and bad weather, collectively contributed to 86% of all flight delays in 2015.

In contrast, in 2016, airline operations management remained the primary cause of delays at 46%, while air traffic control experienced a substantial decrease to 12%. Bad weather accounted for 23% of delays. Notably, airport security saw an increase to 3%, surpassing military factors to become one of the significant reasons for flight delays in 2016.