Thinking again about the hierarchy of happiness you posted Sakura.
I wonder how age has influenced the findings.
Young men, (who most likely are unmarried), have the highest suicide rates.
A lot single women are post-divorce or widowed, afaik women tend to come into their own at middle-age, which would coincide with the above.
There are other factors to consider rather than marital status.
I think the important point to take from the Happiness Scale is the disparity between Married Women and Married Men.
Which is probably the difference between the carer and the cared for.
Wifework (thanks for examples on other thread btw Sakura), stalled career if applicable, balancing the needs of dc, dh, parents AND PIL's (!) getting on in years, against their own needs. Which consistentlty come last. Even just in the daily grind. Pack lunches for DC, iron shirt for DH, school run, housework, supermarket, checking in on elderly relative having remembered to call first in case they needed something from supermarket, rushing home to have dinner ready, homework, remember dress up day at school tomorrow, bath & bed, call friend going through hard time, get next days dress-up outfits ready, talk to DH about his day, remembering awkward colleague and enquiring about it. And finally have a half hour to yourself and being too exhausted to do much except stare at tv for half an hour. So all day thinking and considering everyone elses' needs and no-one doing it for you. And getting accused of being unreasonable if once a year no-one has bothered even to rememeber to pick up a bunch of carnations when filling up at the petrol station.
Just generalising and musing, really.