[michaelmrose]

To clarify imagine a funnel. In step one 61% who try smoking become daily smokers. In step two some percentage n of those who become daily smokers become addicted to smoking.

Virtually everyone who smokes for any reasonable duration will become addicted is a statement about step two and asserting that n is somewhere near 100% based on knowing a plethora of smokers, hearing about how smoking effected them, and watching their struggles to quit and reading about the physiological effects of smoking. It isn't a very scientific analysis and I'm open to more clear numbers if you have them.