When is the last time you updated your resume somewhere?
A recent upload could get you 50 VM/emails a day, no exaggeration. I'm almost 5 years out from the last job search with almost nothing on my linked and 15-20 contacts a week seems average now
I keep my LinkedIn profile up-to-date, but otherwise I don't publish my resume anymore. Nearly all the hits I get are LinkedIn, mixed with a few calls based on seriously out-of-date versions of my resume.
I live in London, 5 messages/day on LinkedIn is my average. I am 28. They probably mostly match Python and Django keywords on my CV, but I've also got other experience.