Spanish to English Other Real Estate appraisal

I'd like to know what this abbreviation means. The appraisal comes from Mexico. Here's the context, from a table that displays the physical value of the property:

"DE LAS CONSTRUCCIONES

Superficie m2
G.C.
Edad
Vida
Años Remanentes
V. Unit
Rep
FCo
FEd
DEMTO.%"

Thanks!