It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
"The Trans-Atlantic Slave Trade Database has
information on more than 35,000 slave voyages
that forcibly embarked over 12 million Africans for transport to the
Americas between the sixteenth and nineteenth centuries."