the population of particular country by age group

The chart illustrates past and future figures of proportion of the population in three different age groups in a particular nation during an 80-year period from 1960. Overall, it is evident that the percentage of the population under 14 years old would experience a dramatic decline, while there could be a tremendous increase to that above 65 years old during this time. The data also indicate that the proportion of the population aged 15-64 might be a slight decrease throughout the period. Interestingly, the percentage of population aged 0-14 and above 65 would follow two opposite trends. Particularly, standing at 30% in 1960, the former could experience an immense diminution of 20 by 2040. Positioning at 15 in 1960, the latter might see an extreme elevation of 30 until 2040. Lastly, it can be seen that the whole period would bring a slight decline from 55 to less than 45 to the remainder.