I just sent out an email requesting responses for the 2015 Resume Writers' Digest Annual Industry Survey. This voluntary survey of career industry professionals is not scientifically valid, but it provides a useful snapshot for resume writers to compare themselves to colleagues.
Want to check out some of the results from previous years? I've provided a link to some of the blog posts describing previous survey results:
Who is an "average" resume writer (2012 data):
Profile of an "Average" Resume Writer
You might also be interested in this post from 2009:
Analyzing the Professional Resume Writing Industry
If you are a Free Level or Bronze member of BeAResumeWriter.com, you can access the most recent "Profile of Professional Resume Writers" special report by logging into your account.