Yoga Guru Ramdev today said that the Modi government has been sincere in its efforts to unearth the black money.However the results have not been satisfactory so far. Talking to media before his five-day yoga camp in Jaipur beginning tomorrow, he said that more efforts are required to address the issue. He said that the Finance Minister Arun Jaitley is in favour of gradually withdrawing currency notes of Rs 1000 and Rs 500 denominations to address the black money and bank transactions more transparent.