[citation needed]
I grew up with plenty of poor high school kids who had no problem finding cigarettes even when the taxes were jacked up on them here in Canada. I know many of them as adults who continued to smoke even as the price has continued to climb over the last 10yrs.
I've never heard anyone say they quit smoking because it was too expensive. It was merely a perk of quitting. Especially considering it's always been an irrational and escapist habit.
I also smoked for years and I can't imagine the price being $5 vs $11 would have had any effect on my decision. High prices via taxes was merely an additional burden, a burden usually placed on people who are in the most need of money.
The only two major change I've seen in recent years pushing people off cigarettes is a) it's no longer cool and b) e-cigarettes