[Air-L] online community statistics

[Lorraine R Buis]

Hello all, 

I was wondering if anyone out there has any citations for updated 
statistics/estimates of the number of Internet users who use online 
communities. The most current estimates I can find are from a 2001 Pew 
Internet & American Life report that indicate that approximately 100 million 
American Internet users have used an online community. Any help would be 
greatly appreciated! 

Thanks in advance! 

Lorraine Buis, PhD
Postdoctoral Research Fellow
Veterans Affairs Health Services Research & Development