India needs to invest $330 billion in infrastructure over the next five years to sustain an average annual growth rate of 8 per cent, says a study conducted by CII. According to the study conducted by the CII Infrastructure Council, the investment in India's infrastructure would need to rise from a level of $47 billion in 2006-07 to a level of $84 billion by 2010-2011. This calls for a total investment of $331 billion in the country's infrastructure over the next 5 years to sustain the current economic growth rate that has averaged 8.1 per cent annually over the past three years.