Germany has a population of over 81 million people, with 42.2% between the ages of 25-54. The median age is 45.3 years and the population growth rate is -0.2%. Life expectancy is 80.19 years. The main religions are Protestant at 34%, Roman Catholic at 34%, and 28.3% unaffiliated or other. Ethnically, Germans make up 91.5% of the population. The leading political parties are the Christian Social Union, Christian Democratic Union, Alliance '90/Greens, Free Democratic Party, and Left Party. Germany has the fifth largest economy in the world and is Europe's largest exporter of machinery, vehicles, chemicals, and household equipment.