However, those are the numbers that you get when you burn the whole cigarette, and not what the smoker actually takes in, even if they keep the cigarette in their lips constantly. So, it's a maximum. Also, when one breathes the smoke out, much of the tar, nicotine and the other 999 substances that come from burning tobacco goes out as well.
Not that I'm saying the medics are wrong in suggesting that people should not smoke, but I have my doubts about their statistics.