This document discusses statistics related to happiness, reasons for depression, and solutions to increase happiness. According to statistics, factors associated with happiness include wealth, social support, health, freedom, generosity, and low corruption. Tunisia ranks 107th in world happiness and has a life expectancy of 74.5 years. Reasons for depression include life events, personal factors, family history, personality, medical illness, substance use, and hormones. The document suggests four qualities to increase satisfaction: friendliness, cheerfulness, compassion, and acceptance of others' shortcomings.