Demonstrated in the provided line graph is how the number of people with diarrhea was evolved in Mashhad from 1983 to 1992. Overall, it is apparent that the number of cases fluctuated in this period.
In the 3 year period from 1983, the number of reported cases rose slightly around 100. Between 1986 and 1987 there was a rapid growth, reaching 200 cases before decreasing to 100 in 1988. However, the total patients dramatically increased to over 400 in 1989, marking the highest point in the entired period. In the next 2 years, the figures for diarrhea cases saw a noticeable decline. Finally, there was a significant decrease, with the number of patients falling to zero.
To sum up, 1989 was the year with the highest number of cases, whereas in 1992 was zero.
