volume @ 172,000 today...and a few recent days getting around...

volume @ 172,000 today...and a few recent days getting around those numbers. Is this be more buying by CM, regent? Seems unlikely to be Mum & Dad's?

Date High Low Close Volume Transactions
Last Ten Days
16-Jun-2011 285 275 283 152,159 129
15-Jun-2011 282 274 281 83,632 116
14-Jun-2011 284 275 282 161,518 136
13-Jun-2011 0 0 285 0 0
10-Jun-2011 286 280 285 92,445 209
09-Jun-2011 285 278 280 50,386 85
08-Jun-2011 291 280 285 52,819 176
07-Jun-2011 295 286 292 162,976 143
06-Jun-2011 300 295 296 70,299 141
03-Jun-2011 300 295 300 191,486 253