CDO fields completeness

Hi,

We are looking for a report to know how many of the CDO records are updated for each CDO field.

We did try with Eloqua REST API's end point : /api/REST/1.0/assets/customObject/{id}

but we only received info of CDO field names, their data type and the default values. we want to know how many records have a value populated for each CDO field.

For example: If a CDO which has 10 records, we want to know how of these 10 records have a value populated in a CDO field called "Account_ID".

Any way to get this data for all the CDOs ?