The study also reveals that a male born in the late 1870's would have had an average life span of 51-years-old and in the 1930's the average life span was 69-years-old.
１８７０年代後半に生まれた男性には５１歳の平均寿命があり、１９３０年代には平均寿命が６９歳であったことが、研究でも分かる。