The 2015 World Happiness Report, which attempts to chart people's satisfaction with their lives in over 150 countries across the globe, found Switzerland's citizens are the happiest. The United States clocks in at No. 15, just below Mexico and just above Brazil. Gallup polls of 1,000 people per country asked people to rate their lives on a scale from 1-10, which is then averaged nationally. Each national "happiness bar" is made up of six factors: Real GDP per capita, healthy life expectancy, having someone to count on, perceived freedom to make life choices, freedom from corruption, and generosity.