Description: The Retirement Plans Experience Committee of the Society of Actuaries (RPEC) is pleased to present this annual update to the RPEC_2014 model and its corresponding mortality improvement scales. This new version of the model reflects historical U.S. population mortality experience through 2018. For clarity, the updated mortality improvement scale based on this 2020 version of the model is called Scale MP-2020. The Scale MP-2020 Report has been posted below along with an Excel version of Scale MP-2020.