The two groups of people researchers say are the happiest

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RICHMOND, Va -- If you're in your 20s or your 70s, new research finds you may be happier than most people.

CBS Atlanta reports on a study from the University of New South Wales in Australia. Researchers looked at data from a national survey.

They found the people who indicated the most satisfaction were in their early 20s.

Satisfaction then decreases and stays flat for about 40 years. It goes up again when a person reaches their 70s.

The reason: researchers say people in their 20s and 70s are not as concerned about living standards as everyone else. Instead, their priorities are recreation  and free time.