The provided diagram illustrates the data about the city population percentage in four Asian countries from 1970 to 2020, with the expected figures for 2030 and 2040.
Overall, it can be seen that all three countries including Malaysia, Thailand, and Indonesia have been experiencing an upward trend in living cities for several decades, while the Philippines experienced spike in numbers.
Moving to a more detailed analysis, Malaysia and Indonesia have the same pattern. They showed a marked increase from 1970 to 2020, with initial figures of 30% and 14%. By 2020 Indonesia had reached approximately 50%, whereas Malaysia was at 75%. It is predicted to grow by 10% up to 2040 for Indonesia and about 8% for Malaysia.
The urban population of Thailand saw a gradual rise up to 2020, showing 30%. In contrast, the percentage of urban residents of the Philippines grew sharply by 1990, reaching the highest point at 50%, with rapid fall to almost 40% in 2010. Finally, both nations are forecast to demonstrate an uptrend throughout 2030 and 2040.