I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "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."? 

What does the P in "GSDP" stand for?