The IPA has been undertaking an annual membership census since 1960. The IPA Agency Census is considered to be the definitive media, advertising and marketing communication agency survey because of its wealth of employment trend data across a number of categories: size and geography of agency; male to female ratios across job titles; agency churn rates; and different ways of working.
This page links to surveys dating back from 1998. Earlier data can be supplied on request.
The latest Agency Census (2013) can be downloaded here
Archived versions (from 1998) are available to download in Related Content.