The index of industrial production (IIP) increased 7.4% in August 2005 as against 8.6% in August 2004. IIP moved up 8.8% between April-August 2005 as against 8% in the year-ago period.Manufacturing, which carries the highest weightage in the IIP basket, grew 8.2% in August as compared to 9.1% in the year-ago period, according to the latest data released by the government today.While the electricity sector posted a growth of 5.9% as against 7.7% in August 2004, the mining sector reported a negative growth of 1.3% as against 4.4% in August 2004.