In all cases in which the probable duration of the natural life of any person from and after a particular age is material, standard statistical tables of mortality are competent evidence of such probable duration or expectation of life.
31-08-06. When instruments affecting real property, or records or copies of records thereof, admissible in evidence. Every instrument conveying or affecting real property which has been acknowledged or proved and certified as provided by the laws of this state, together with the certificate of acknowledgment or proof, may be read in evidence in an action or proceeding without any further proof. The record of such instrument, or a duly authenticated copy of the record, may be read in evidence with the same effect as the original, on proof by affidavit or otherwise that the original is not in the possession or under the control of the party producing such record or copy.