Production Costs provides a brief summary report of advertising production expenditure made by UK advertisers. It is based on an annual survey of the larger members of the Incorporated Society of British Advertisers. While the survey is based on the UK, it is probably reasonable to assume that broadly similar cost ratios apply in the other leading advertising markets around the world.
Production Costs summary report
A brief summary report of UK advertisers' advertising production expenditure (from 2011).
More recent production costs data can be found in Warc's Expenditure Report.