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One of the first hints that the chart is not truly useful is the misuse of the word pandemic. To be a pandemic, it must occur in multiple places, so a Japanese smallpox epidemic would never make the pandemic definition. Another problem with it is that it is comparing disparate data. The number of years and the populations (either worldwide, national, or possible exposure) are necessary for a valid comparison. Even better would be the number of cases total, with the number of fatal cases, and the number of cases that were not fatal but had lasting medical effects.

Unlike the others, I would include the HIV/AIDS epidemic. To be fair though, you would have to add in what factors were taken to prevent/mitigate or encourage the spread of the disease. There is a common myth (based on a single possibly true incident) that the US government tried to wipe out Indians by giving them smallpox, so HIV is not the only potential epidemic that might have social engineering assisting in the spread.