Private investment in infrastructure has come mainly in the form of public-private partnerships. : Stressing the need for creating a time-bound comprehensive dispute resolution mechanism for projects in infrastructure, the Survey said this would help attract crucial private investment in the sector and would aid the government in generating additional funds for completing various projects. It said India needs to spend 7-8% of its GDP on infrastructure every year, translating into an investment of $200 billion annually. However, the country has spent only around $100-110 billion per year on infrastructure, leaving a deficit of $90 billion.