freebeer
Heh.  interesting - there is either a typo on the survey, or in OSM. (OSM matches TIGER).
 Tlafore, I'll try to come up with a brief summary/explanation as to why this is greek to both of us, how I understand it, and why there was no simple useful number to be found in the survey, from a beginner's point of view (one is never too old to learn, so they try to tell me)