Enligt wiki så fastnar 50% men då i en "smoke machine". Borde väl vara ungefär samma som när en människa röker.
In laboratory testing, filters have been shown to reduce "tar" and nicotine smoke yields up to 50%, with a greater removal rate for certain classes of compounds (e.g.,*phenols) compared to others—the filters are particularly inefficient at removing gases of very low molecular weight, such as*carbon monoxide.
https://en.m.wikipedia.org/wiki/Cigarette_filter