Getting Trials of Osiris Data

I am trying to throw together something that needs data from ToO. I'm making the following API call: http://www.bungie.net/Platform/Destiny/Stats/ActivityHistory/1/{membershipId}/{characterId}/?mode=TrialsOfOsiris However, it is only returning the most recent Trials Data (Firebase Delphi from last weekend) and not any of the previous Trials info. How do I go about getting the rest of the data?