Long abstract

Publications & Documents

The correct use of the missing codes is an essential condition to ensure the integrity of the data. Different reasons why there are no data in a particular instance need to be distinguished in the statistical analyses and the reports and must therefore be distinguished in the data tables.
 Each cell for which there is no valid data value must be assigned one of the following five missing codes:
• category not applicable (a);
• data included in other categories (x, xr:..., xc:..., xa:...);
• data not available (m);
• data value nil (n);
• data value negligible (n...).