Analysis shows that for both males and females, people aged around 60 to 84 years were the main contributors to increasing life expectancy, but these improvements have slowed down considerably.
Mae dadansoddiad yn dangos mai dynion a menywod 60 i 84 oed sy’n cyfrannu fwyaf at gynyddu disgwyliad oes, ond mae’r gwelliannau hyn wedi arafu’n sylweddol.