How important are coral reefs?

Reefs at Risk Revisited is a project (2011) by World Resources Institute. It calculated three different indexes. Reef Dependence index, Adaptive Capacity index and Social Vulnerability index. Here the Reef Dependence Index is represented. The index is classified on four categories low, medium, high, and very high. This dataset is a subset of the original dataset. To access to the full dataset and additional information: https://datasets.wri.org/dataset/reefs-at-risk-revisited-social-vulnerability-data