There's a distribution there that needs to be mentioned, because most job applications are submitted by unqualified applicants.
My last half dozen gigs have taken 0-2 emails to secure. The 2 was a genuine job search where I identified two possible fits and reached out. The zeros all were people seeking me out.
Contrast that to the guy applying for your Sr. Developer position who can't FizBuzz. He has applied to 1000 such jobs already. Every one he's seen. All over the country. Every once in a while a company will make the blunder of hiring one of those people (they make up 99% of the applicant pool, because they are always on the market, whereas skilled devs are not), he will skew your number.
So yeah, that guy averages a couple hundred applications before scoring.
But you don't want to emulate his tactics, or you'll find yourself lumped in with him and filtered out of every job you apply to.