The gross state domestic product (GSDP) of Delhi at current prices for the year 2011-12 has been estimated at Rs 3.13 lakh crore, which is an increase of 18.7 per cent over the previous fiscal.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The GSDP of Delhi increased by what percentage over the previous year in 2011-12?
18.7