"Coal production generates substantial revenue for both Centre and state governments, with royalty collections reaching Rs 23,184.86 crore in the fiscal year 2022-23," the statement said. Coal is the single-largest contributor to railway freight, with an average share of nearly 49 per cent of the total freight income amounting to Rs 82,275 crore in 2022-23 alone. This revenue contribution has surpassed 33 per cent of total railway earnings.