47% of Americans are satisfied with their jobs, according to Conference Board. Twenty years ago, about 61% of workers were happy with their jobs. In 2005, 52% were satisfied. The happiest workers are those over 55, those who make more than $50,000 a year, those who put in more than 50 hours a week on the job, and those who live in the Mountain states. The least happy workers those are under 25, those making less than $15,000 year and those living in the Middle Atlantic states.