[_cs2017_]

Source is unclear. Self-reported by candidates? Huge bias then, since people may or may not want to say whether they got / didn't get an offer, and whether they accepted / rejected an offer, and this split may vary by company and by year very significantly.

[racketracer]

Why would it change by year? I get it could happen by company if some companies are much more secretive than others but not sure why it would change year over year.