How have petrol prices changed in India since independence?

Petrol cost ₹0.25/litre in 1947, when India gained independence, but jumped to ₹0.90/litre by 1970, and to ₹4.20/litre in 1990, just before the Indian economy was liberalised. Petrol cost ₹21.13/litre in 1996 and, with the turn of the millennium, it hit ₹25.94/litre. It later reached ₹43.51/litre in 2005, ₹51.43/litre in 2010, ₹72/litre in 2014 and ₹80/litre in 2020.