Less Sleep, More Work Hours

It has been estimated that sleep deprivation costs the Japanese economy more 30 trillion US dollars a year, and some newly released survey results show that this figure could be on the increase:

The amount of sleep people in Japan get has been falling among both men and women ever since the first survey was conducted in 1986.

People aged between 45 and 49 got the least amount of sleep, with the average standing at 7 hours, 5 minutes a night. Next was a group of people aged between 40 and 44, who got an average of 7 hours, night minutes sleep each night.

Sleeping the longest was the group of people aged 85 or over, who got 9 hours, 47 minutes of shut-eye on average.

The survey also showed that working hours were increasing. Up until 2001, the amount of time people spent working had fallen, but a turnabout was subsequently seen with an increase in 2006, when the latest survey was conducted.

Anyone got a guess on how much of the recorded sleep took place on trains?