Hello,
Are you asking about the level of commitment of the aggregate (i.e. how much thin-provisioning was done against the aggregate)? I found some older threads where knowledgable NetApp folks essentially said "nope, no way to display committed percent via the CLI". However, if you're using OCSM, you can click on the volumes tab of the aggregate information page and it shows it there.
OCUM displays the information as well.
Hope that helps,
Chris