Data quality completeness checks

I'm currently looking into carrying out some basic level data quality
checks for a dataset. But little unsure what are the best statical
tests I can carry out on the results of measuring for levels of data

I have included an example of a check for comepleteness of the
dataset. From this raw data I would like to have a completeness
rating for each field and provider. To then compare and rank
providers by the individual fields. Lastly I would also I to give
them an overal rank for completeness for all fields. Can you suggest
what types of stats tests I could carry out on this data? Keep it
simple for me as not really an stats expert at all.