What does the P in "GSDP" stand for? Given the previous question, write a context that contains the answer. It can be 1 - 20 sentences. Context:
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.