International freight traffic dynamics

It turns out there are so many types of railway freight cars—how many do you know?

There really is a vast variety of railway freight cars!
Open Wagon: Transports bulk cargo.
Boxcar: Transports cargo requiring protection from rain, sun, and freezing temperatures.
Tank Car: Transports liquids, liquefied gases, and powdered goods.
Flatcar: Transports bulk cargo, shipping containers, and machinery.
Hopper Car: Transports loose bulk materials.
Insulated Car: Transports cargo requiring thermal insulation, refrigeration, or freezing.
Livestock Car: Transports live animals.
Mail & Express Car: Transports mail and express packages.
Self-Discharging Car: A freight car equipped with a tilting mechanism for unloading.
Molten Metal Car: Transports high-temperature liquid metals.
Heavy-Duty Flatcar: Transports oversized and super-heavy cargo.
Freight EMU (Electric Multiple Unit): Transports time-sensitive cargo.