Field_value vs Col_name in CSV, XML,.. exports

[git-lligas]

Is it possible adjust export to CSV etc. Field Values (from Option Lists) instead of Displayed Text?
e.g. if Options are set: Field Value "1" Displayed Text "Yes", Field Value "0" Displayed Text "No".

According to Smarty Template in Export Types
{assign var=value value=$submission.col_name}
are exported "Displayed Text" values (e.g. "Yes").

How to adjust the Smarty Template to get the Field Value (e.g. "1" when answered "Yes") for exports?
The reason is that I need to work with codes of the answers not with displayed texts. Am I missing something if I guess the field values in Option Lists are there exactly for that purpose?

I have tried just blindly {assign var=value value=$submission.field_value}, but with no effect.
Many thanks for help!

Form Tools 3.0.15, Export Manager 3.1.0