Depreciation
It is the value of the assets which can be reproduced and depreciated during the year, depreciation is calculated on the current substitutive value
Universe
All enterprises and establishments are classified according to the Establishments Census 2007
Source of information
The enterprise owner or general manager
Imputation and derivation
Imputation
The interviewer and supervisor firstly edit technically the questionnaire according to editing rules.
Derivation
After the editor finishes editing the questionnaire, a coding are used according to (ISIC - 3), then the questionnaire is transferred to data entry.