New data has recently become available beyond what was used in constructing MI-2017. This paper looks at what the impact would have been on MI-2017 if the new data had been available earlier; the construction method is the same as stated in the report on MI-2017. It concludes that a revision to MI-2017 is warranted because of two significant features: the recent improvements at older ages are distinctly lower than what MI-2017 expected; and the opioid crisis appears to have had a material impact at the young adult ages, resulting in significant mortality deterioration.
