[wccrawford]

We used to have a surplus of plastic bags before we started making a concerted effort to use cloth bags. (I don't know what they're actually made of, but they're designed for re-use.) Now, we actually run out of plastic bags that we used to use for various things like dog-poop (when we run out of smaller bags and forget to re-order), small bin liners, and general transportation needs. (Though for the latter, we almost always get to re-use the plastic bag again afterwards.)

So my answer is: For those who aren't recycling, I'd guess that most people throw bags out. For those who are, it's going to be a smaller number, depending on how hard they try to avoid plastic bags at the market.