Stock or Inventory Usage report

Hello, 

Where do I get a, " "previous 12 months stock usage" report that I use to help with predicting stock reorder levels"? I am working on an inventory project and part of what the consultant is asking me for is a usage report that will show me previous 12 or up to 24 months stock usage for all inventory items we have in the item master. Can someone help find this report or figure out how to get one that does it?

Thank you, 

Greg Little