Sent_en: 2zh People born in the late 1870's had a 23% chance of not making it to see their 15th birthday, people born in the 1900's had a 15% chance, people born in the 1930's had a seven percent chance, people born in the 1960's had a three percent chance and those born around the 1990's had a one percent chance.
Sent_yy: 19世纪70年代末出生的人有百分之23的可能不会过15岁生日，20世纪0年代出生的人有百分之15的可能，20世纪30年代出生的人有百分之7的可能，20世界60年代出生的人有百分之3的可能，90年代左右出生的人有百分之1的可能。