This ratio unveils specific number of cases of X diseases in Someland from 1983 to 1992.
The rate had started from the point of 100 cases in 1983. It had been remaining stable during next 2 years. However, in 1986 it has slightly risen to 180 individuals, who had come down with illness. Over the next year, it had gone up with extra 20 people and had reached the point of 20. Otherwise, the graghic had caught the downward trend and plunged to 100 in 1988. In 1989, the graph illustrates unbelievable increasing, it had markedly surged to 400 of ill people. Although, in 1990 it had decreased in number and leveled off at 350. Nevertheless, it 1992 it had been committed a breakthrough case, so community had plummeted to 0 happens.
Overall, it precisely presented totally fluctuating graph. The highest level of diseases had been in 1989, when the lowest in 1992.