Command for more horses and less cars on the map?

Does anyone know these commands for the start.bat?

ridablehorse.population <value>

modularcar.population <value>

Thank you.
Can you give me the vanilla values so I know what to use?

ridablehorse.population 2

modularcar.population 3

Thanx again.

Merged post

Do you also know if there are commands for the heli, cargo ship or chinook event?