Here's real data, although not at a per user basis.
Code:
Month Unique Number Pages Hits Bandwidth
visitors of visits
Jan 2012 117762 406368 10482699 36571512 267.37 GB
Feb 2012 123053 411961 10310503 34431305 294.71 GB
Mar 2012 147299 451620 10968662 34493986 297.31 GB
Apr 2012 132693 391689 10204041 31063844 283.72 GB
May 2012 110652 320205 7192993 19741372 178.24 GB
Jun 2012 93574 248018 4798713 11888302 114.70 GB
Jul 2012 88978 234091 4257187 11741809 107.22 GB
Aug 2012 84522 223015 4025538 10122236 104.67 GB
Sep 2012 89680 229743 4429966 11030087 113.19 GB
Oct 2012 95593 254069 7048877 16152851 183.90 GB
Nov 2012 99199 269695 10653608 21315141 270.36 GB
Dec 2012 104089 295736 10772856 23234741 328.08 GB
Total 1287094 3736210 95145643 261787186 2543.46 GB