Poof of income from Canada

Hello!

I am planning to retire from the Canadian Forces in January 2025 and to settle in Arequipa. Currently, I live in Canada and I have a couple of questions with respect to my future income proof. The Superintendencia Nacional de Migraciones requires a proof of PERMANENT NET income in USD. The three words in capital letters causes huge troubles fore me, The thing is that I will begin getting my pension only in January 2025 and I am expecting to get my pension paperwork package shortly.  But it will contain only an estimate of my potential pension so far. How can I prove it is PERMANENT? It is too early to ask for any statement from Canada Revenue Agency. I understand that it can be done in a year or so only and I want to get the pension visa ASAP. Also, I am pretty sure that  amount shown in this package from Canada Pension Service will be BRUTTO (BEFORE TAXES) and for sure, in any oficial paper I can potentially get here, it will be in CAD, not in USD.

People, if somebody knows or has any suggestions how to fulfil The Superintendencia Nacional de Migraciones wrt income proof, please help me!