New Delhi Oct 29 PTI The output of eight core sectors rose 44 per cent in September on account of healthy performance by segments like natural gas refinery products and cement official data showed on Friday The eight infrastructure sectors of coal crude oil natural gas refinery products fertilisers steel cement and electricity had grown by 06 per cent in September 2020 as per the data released by the commerce and industry ministry Core sectors growth stood at 115 per cent in August this year The eight core industries comprise 4027 per cent of the weight of items included in the Index of Industrial Production IIP Production of natural gas refinery products and cement increased by 275 per cent 6 per cent and 108 per cent in September 2021 respectively However crude oil production declined by 17 per cent in September year-on-year The growth rate of these infrastructure industries during April-September 2021-22 stood at 166 per cent as against a contraction of 145 per cent in the year-ago period PTI RR ABM ABM