However, over the years many of these PSUs came to incur heavy losses, became centres of inefficiency, caused a serious fiscal burden and came to represent the worst face of the government in business. Sudhir Naib in his book, Privatisation in India: Journey and Challenges, analyses official data and notes that with just five central government-controlled enterprises in 1951, the number grew to 249 in 2019, of which the top 10 earned a net profit of Rs 107,947 crore, 61.83 per cent of the total profit. The top 10 loss-making enterprises made a net loss of Rs 29,751 crore, over 94 per cent of the total loss. Together, these companies reported a net profit of Rs 142,952 crore in 2019.