Receipts for transactions have rake information available. That would be the specific amount(s) raked from that transaction. The fixed rake is available in the Summary tab export, but I don't really see it anywhere else. It should probably be part of most exports. Regardless, if you're exporting from the Prizes page, rake information won't be available because those exports aren't about any particular transaction where a rake would have been applied. From where are you exporting?