The provided chart compares and contrasts data on the changes in the number of patients suffering from diarrhea in Mashhad during a decade between 1983 and 1992.
By and large, as clearly shown in the chart, diarrhea cases witnessed a downward trend during the displayed span. It can also be seen that while the vast majority of incidents took place in 1989, there was no case appearing in the last year.
A deep analysis of the given chart reveals that the number of diarrhea patients stood precisely at 100 cases in the outset in 1983, which remained relatively unchanged in the next year. Interestingly, this figure experienced a small increase during the subsequent 3-year span, at exactly 200 cases. Nonetheless, after having such a growth in 1987, by 1988 this figure recovered incredibly to the previous position of the first year. In stark contrast, next year, the number of incidents rose significantly, reaching the peak of approximately 400 cases, but then decreased minimally by 50 patients and maintained roughly the same level in both two years later, respectively. It is noticeable that an impressive decline was recorded at the end of the given time frame, which saw no diarrhea patients existing in Mashha.