It's difficult to say. We certainly don't get our door knocked on very often and I've only seen them near the carts when when we've been visting major towns. I've never seen them in our local town.
According to family there's been a lot of reorganisation/ merging of local congs so it's even difficcult to gauge numbers (I sometimes think it's a useful side effect for them) that attend. My mother said that if I went back to my home cong (last went twenty years ago) I wouldn't recognise any of the faces.