Band 6+: The pie charts below show the leading causes of insomnia, in percentages, as reported by two groups of people. The people in group A were between the ages of 20 and 40 and those in group B were between 60 and 80.

The given pie charts depict How many people bare insomnia because of 6 main factors: depression, medication, environment factors, ill health, drinks with caffeine, and stress, dividing into 2 groups by their ages: group A from 20 to 40, and group B from 60 to 80.

Overall, it is obvious that stress is the main reason of insomnia, and ill healthy is the least common in young ages. While, the dominant cause is ill health and stress does not cause much in oler group.

To begin with, in group A, stress is followed by drinks with caffeine with 40% and 29%. Depression and other factors caused by environment are shared a same data with 10%. Medication is higher than ill healthy just only 1%.

Looking at other statistics, ill health doubled drinks with caffeine by 31% and 15% in group B. Furthermore, It also followed by medication with 20%. Stress in older people is compared with young ages, 8% and 40%, respectively.