Identifying High Usage Replication Volumes in a Remote Copy Group

[L1nklight]

I have a group of volumes placed in a Remote Copy Group. For the better part of a week, replication has run over the allotted time and I've been getting a degraded message on replication time. This is fine because I am only getting it for one interval, but I would like to know which volume in the remote copy group is creating so much change data. I have both the SSMC and the standard management console. Does anyone have any ideas how I can trace which volume is replicating the most/longest?