(HELSINKI) — Finland has topped an index of the happiest nations for the second consecutive year, with researchers saying the small Nordic country of 5.5 million has succeeded in generating a happiness recipe for a balanced life not simply dependent on economic and material wealth. The World Happiness Report, produced by the U.N Sustainable Development Solutions Network, ranks 156 countries by how happy their citizens see themselves to be. It’s based on factors including economic wealth, life expectancy, social support, freedom to make life choices and levels of government corruption. The index, published Wednesday, showed the other Nordic countries did well again this year, with Denmark, Norway and Iceland taking the next spots.