How can I see what data rate a client is connected at in our LWAPP environment?

If I click on 'Client' from the WLC main screen and then click on a client I can access information such as RSSI, SNR etc., but it doesn't display the client's connection data rate, ie., 24Mbps.

Assuming the client is a Cisco 7921G (which they mostly are in our environment), when I web browse to the IP address of the phone, I get all the same information, but still no data rate.

Can someone point me in the right direction?