The graph illustrates the incidence of X disease in Someland from 1960 to 1995. Overall, the chart shows fluctuations throughout the different years, it was entirely ended by the end of the period.
To begin with, the number of incidence of X diseases increased significantly from 100 cases in 1960 to 200 cases in 1970. Cases continued to rise sharply from 200 to 500 cases between 1970 and 1975. This figure remained stable until 1980.
After experiencing a steep increase to 500 cases in 1980, there was a sharp decrease to around 350 cases in 1985. The incidence continued to fall, dropping from approximately 350 cases in 1985 to zero in 1990. From 1990 to 1995, the incidence of X disease in Someland remained unchanged.
In summary, while the number of cases rose sharply in the beginning of the period, it fell significantly again towards the end.
