Changes in individual life expectancy and number of expected deaths per year are dual quantities. Talking about either one is fine. That said, you’re right that

Changes in individual life expectancy and number of expected deaths per year are dual quantities. Talking about either one is fine. That said, you’re right that it’s not actually 0.0001, but probably closer to 0.004. So if I live for 80 years I’m giving up maybe 4 months of EL. Still an easy trade.