Are most of major cities in the interior or on coast?

Because coastal regions have easier access to trade via ports. Rivers have also historically provided valuable access routes into the interior; these routes, when combined with coastal ports, could facilitate a city’s access to trade between other coastal cities along the coastline as well as trade networks that reached far upstream, and in some cases far into the interior of continents.

Most of these large coastal cities emerged where fertile lands met waterways that allowed transport to the coast and other population centers.