[cheshire137]

Using tampons doesn't rule out using pads, too. If I use a tampon one day, I'm one of that 70% of menstruating women that uses tampons. If I use a pad when I swap out that tampon, I'm now also one of the x% of menstruating women that uses pads.

[teamhappy]

Realised that the second I pasted the text. It's midnight in Germany ... That's the original link I found: http://askville.amazon.com/AMERICAN-WOMEN-TAMPONS-PADS-PERIO...

And here is another statistic: https://www.ncbi.nlm.nih.gov/pubmed/22980411

They're both not clear though I do think it's fair to say tampons are preferred. Just google for "tampons vs. pads".