The given line graph illustrates information about the number of cyclones worldwide in three different categories of severity, including bad, mild, and severe over a 25-year period between 1975 and 2000.
Overall, it can be clearly seen taht there were fluctuations in the number of cyclones worldwide for all categories. Also, the number of cyclones worldwide for mild category was by far largest all over the given period period, with severe category experiencing the smallest number of cyclones at the sametime.
With regard to the number of cyclones for mild category, having started at about 96% in 1975, the figure then decreased to 85% five years later. Subsequently, the figure for mild fluctuated before decreasing to 80% in the final year.
If we look at the number of cyclones for bad category, it began at 50% in the first year, after which the figure fall by 8%, reaching a low of 42% in 1980. Then, it increased to 51% in 1995, at which point it decreased to 45% in 2000.
As for the number of cyclones for severe category, it comprise 18% of total cyclones, and subsequently it reached its peak at 28% in 1995, after which it fall to 22% in the final year.