How many social fraternity and sorority chapter houses are there in North America?

Here is a list from Wikipedia of all social fraternities and
sororities part of the North American fraternity system:

http://en.wikipedia.org/wiki/List_of_social_fraternities_and_sororities

Totals:
89 National Fraternities
51 Local Fraternities
*
42 National Sororities
25 Local Sororities
*
10 Co-ed Fraternities