US Life Expectancy Ranking Drops, Spain Takes the Lead By 2040, research from the Institute for Health Metric and Evaluation (IHME) suggests the U.S. ranking will drop from 43 to 64. The IHME study suggests that Spain will beat out Japan for the top ranking of the world's life expectancy table. On average, people in Spain will live for 85.8 years. The life expectancy for people in the U.S. will be 79.8 in 2040. That is only 1.1 years longer as compared to Americans' life expectancy in 2016. The average global life expectancy rise over that same period is 4.4 years. The authors of the study are quick to point out that "the future of the world's health is not preordained." Kyle Foreman, data science director IHME, via CNN