Delhi: The rupee has fallen by four per cent in the past month amid weakening markets. In this stage oil trader said they would increase prices of palm oil and sunflower oil. It is now revealed that palm oil will increase by 3% and sunflower oil and soybean oil by 4%. India imports 70% of edible oil. It is around 23.5 million tonnes per year. Besides, the rupee has depreciated by more than 20% in early trade.