Lol. I wondered where this was going. When I was working for the cigarette company I found this part interesting as there were more female smokers than men in the 18-30 range. This is why I used to promote at ladies nights and not the strip clubs around the corner. One can go further breaking it down into race and religion as in some parts it is frowned upon. Your stats also prove that point.
I am guessing it would also be affected (hopefully) by pregnancy rates too, where women would smoke less if pregnant or nursing and therefore, more likely to quit? I think there are pretty good signs from those numbers that there is a cultural element heavily in play as to why there are big differences as well as virtually no difference in some places. Scandinavia is pretty well known for having a lot less disparity between men and women across most areas of society.
Yes where there is more equality the numbers are fairly similar. I wonder if the drinking habits are similar as well? You would have to be careful dating in Scandinavian countries as you are likely to find a beer swilling chain smoker in the under 30's age categories anyway.
At least in Scandinavia they are likely to be - although problem drinkers probably skew toward the men a fair bit.
In my experience, very few in Scandinavia are "careful" in pretty much anyway :D