Number of cases of X disease in Someland between 1983 and 1992

Number of cases of X disease in Someland between 1983 and 1992.

The line chart illustrated how many people diagnosed with X disease in Someland over the course of nine years starting in 1983.

As can be seen from the chart, it is clearly evident that the quantity of cases of X disease fluctuated considerably over the time frame. It registered the highest figure in 1980.
Commencing at 100 cases in 1983, there was a slight increase in the number of cases of X diseases in the next two years, with to over 100 cases. It then continued to rose at a higher rate, reaching at 200 cases by 1987, after which this figure fell noticeably to 100 cases in 1988.
At which point, this figure started roaring to the peak of 400 cases before witnessing a moderate decrease of 50 cases in 1991. This was followed by a plunge of 350 cases to 0 case at the end of the period, a fall of 350 cases in 1 year.