" A Conference Board survey released in January of 2010 found that only 45 percent of workers surveyed were happy at their jobs, the lowest in 22 years of polling.2 Depression rates today are ten times higher than they were in 1960.3 Every year the age threshold of unhappiness sinks lower, not just at universities but across the nation. Fifty years ago, the mean onset age of depression was 29.5 years old. Today, it is almost exactly half that: 14.5 years old. "

― Shawn Achor , The Happiness Advantage: The Seven Principles of Positive Psychology That Fuel Success and Performance at Work