Kazakhstan is the world's largest landlocked country with a territory of 1,053,000 sq. mi and a population of 16.6 million, primarily consisting of Kazakhs and Russians. It gained independence from the Soviet Union in 1991 and has a presidential republic political system, with Astana as its capital. The economy is diverse, relying on industries such as oil, agriculture, and manufacturing, with a GDP per capita of $11,169 as of 2011.