This is a good representation for the data it is representing. There are colored arrows that highlight the change that the creator of the visualization intended for the audience to see. It brings the users eyes right to it with the pop of red. It may be harder to distinguish if the audience were color-blind, but there really isn't much else that could be done for this visualization. Some improvements that could be made would be to make it interactive. Maybe a hovering mouse that could more clearly show the year and percent, or even some kind of zoom to see the smaller fluctuations. The visualization is good in general, but it could be improved slightly by interaction.
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