More importantly, do you factor in people died from otherwise treatable diseases as negative happiness, or neutral (as they no more have a brain to secrete serotonin)? Is death unhappiness? For the subject and his relatives? When death is commonplace is it still a source of unhappiness or accepted as a part of natural flow, with human life being regarded as less permanent and more ephemeral, with greater emphasis on the present moment and less on future plans and ambitions?