Once again, Bob, N6TV has compiled statistics on the RBN during the 2013 CQWW CW contest. But as seems to happen a lot to us, the infrastructure isn't up to the task. In this case, it's the blogspot editor, which can't handle a file this big, so I have put the data out on Dropbox in .pdf form. You can access the file (and download it if you wish) at this Dropbox location.
73, Pete N4ZR