Up to you but it will only be used to negotiate against you. If they like you they can offer what they will. In 40+ years at various jobs I've never submitted or even been asked for this, but I suppose in some cultures it may be "normal". Personally it's none of their business IMHO, and their asking for it is a red flag to me. I would politely say " I am not comfortable sharing this information with you, thanks anyway. "