DISCLAIMER: I do not have access to the data requested.
However, I do think that I can answer your question.
The point of bounties is not to necessarily increase views, as implied in your question. Rather, it is an incentive for viewers to actually answer the question instead of passing it over.
Think of it this way: I offer a bounty on an unanswered question with, say, 200 views. If, when the bounty expires, the question has 2,000 views and no correct answers, then the bounty did not serve its purpose. If, on the other hand, the question is answered and has no additional views, then the bounty did serve its purpose - it gave a previous viewer the incentive to add some extra effort into answering the question.
Sometimes the answer-er is a new viewer, sometimes not. Sometimes the bounty increases views; sometimes not. Occasionally, the bounty is even placed simply as an award to an already-given answer.
TL;DR Bounties are supposed to increase answers, not views.