UPDATE: made a few changes based on dmlitzau and others feedback; check the comment thread with dmlitzau for the latest
_Note1: some voyages visited more than one destination, so that's why embarkation ports like Rio de Janeiro, Brazil have may have one sailing, but multiple outgoing lines._
_Note2: I tried generating a world map flow from this data, but the chart didn't come out as pretty as expected. A different previous world map with similar data was deleted for using dots._ #education source