Hmmm. Does that mean AVERAGE 4 smokes a week or 4 smokes every week?
The way I understand it is 4 or more uses of tobacco in any week that happened during that last 6 months. So if you use tobacco 4 times in the span of 7 days, you are a "tobacco user" for at least the next 6 months.
And there's no differentiation between inhaling and not inhaling. They count chew and snuff etc. the same way. So a cigar or a dip is the same thing as far as the rules go.
With everyone so worked up about second hand smoke, I wonder why they don't count anyone who has walked past a smoker more than three times in a week. Seems like they should be considered smokers too. Or maybe they could just count the people who do that annoying fake cough thing...