Hi Friend,
I cannot say that there is a exact command but you may get some output with "sh mac" command for the Xmit-Packet-Rate, Xmit-Octet-Rate, Rcv-Packet-Rate, and Rcv-Octet-Rate.
The Xmit-Packet-Rate, Xmit-Octet-Rate, Rcv-Packet-Rate, and Rcv-Octet-Rate fields display approximated average utilization rates rather than exact values. The approximated average is based on the previous approximation values, the last counter values read from hardware, the load time interval (fixed at 5 minutes), and the polling interval
Check this link
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_8_5/cmd_ref/sh_ml_n.htm#wp1028548
Also you can try "sh top" command to generate a report for port utilization
Have a look at this link
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_8_5/cmd_ref/sh_ti_tr.htm#wp1027897
HTH, if yes please rate the post.
Ankur