According to the UK government [1] there's been a gap back to at least the 1850s...

leereeves on Nov 30, 2019 | parent | context | favorite | on: Longevity Linked to Proteins That Calm Overexcited...

According to the UK government [1] there's been a gap back to at least the 1850s, which was growing worse until 1970, and has since been getting better, but remains considerably higher than in 1850.

1: https://www.ons.gov.uk/peoplepopulationandcommunity/birthsde...