The economy of India has transitioned from a mixed planned economy to a mixed middle-income developing social market economy with notable public sector in strategic sectors. It is the world's fifth-largest economy by nominal GDP and the third-largest by purchasing power parity (PPP); on a per capita income basis, India ranked 139th by GDP (nominal) and 127th by GDP (PPP). From independence in 1947 until 1991, successive governments followed Soviet model and promoted protectionist economic policies, with extensive Sovietization, state intervention, demand-side economics, natural resources, bureaucrat driven enterprises and economic regulation. This is characterised as dirigism, in the form of the Licence Raj. The end of the Cold War and an acute balance of payments crisis in 1991 led to the adoption of a broad economic liberalisation in India and indicative planning. Since the start of the 21st century, annual average GDP growth has been 6% to 7%. The economy of the Indian subcontinent was the largest in the world for most of recorded history up until the onset of colonialism in early 19th century.