Figure 2.

The global unmet need for transplantation greatly exceeds that of the United States (see Fig. 1), which contains roughly 4% of the world’s population but performs 25% of its organ transplants. By comparison, the continent of Africa contains roughly 16% of the world’s population but performs fewer than 0.5% of its organ transplants (http://www.transplant-observatory.org/summary/; https://esa.un.org/unpd/wpp/publications/files/key_findings_wpp_2015.pdf).