The following steps will help you see your unsubscribers.
STEP 1: Go to the lists tab under the email page.
STEP 2: Click on the button that says statistics under the column of actions. (You can choose which list you want to see the statistics for)
STEP 3: You will now be able to see the statistics of your subscribe rate, your unsubscribe rate, the number of unsubscribers and total unconfirmed recipients based on your open rate and your click rate.