IPL 2015 made contribution of a whopping Rs. 11.5 billion to India's GDP.A survey conducted by top financial auditing firm KPMG on behalf of the BCCI said, the total economic output associated with IPL matches in India for 2015 is estimated at Rs. 26.5 billion.According to the survey, the 2015 season saw around 20 per cent of attendees visiting from cities other than the host city.Also notable were international visitors primarily from the United Kingdom, Australia and South Africa.