Across all major objective markers, people seem to become happier as they get older, finds researchers from Princeton University (New Jersey, USA), who compiled data resulting from a 2008 Gallup Survey of 340,847 Americans, ages 18 to 85 years.  The general pattern of emotional well-being appeared to feature stress and anger on steep decline beginning in the early 20s, worry elevating through middle age and then declining, and sadness remaining essentially flat throughout life.  The team found that enjoyment and happiness, while decreasing gradually until we reach our fifth decade of life, rise steadily from age 50 to 75 years.