insidetheKH, I came in through the preaching work but in my 8 years in I never saw more than one person who came in as a result of the door to door work.
Also, sir82 makes a valid point about downsizing in the organization. And others have made the observation that mentally unstable people as well as lonely people make up a good percentage of the new ones. I even heard a brother admit to that back in the 70s.