The manufacturing sector's share of India's GDP declined from 15.7% in 2011-12 to 15.2% in 2012-13, and it may fall below 15% in 2013-14 due to slowing demand. Depreciation costs increased for major Indian manufacturing companies Tata Steel, JSW Steel, and L&T from 2011-12 to 2013-14 as revenues grew, though the growth rates varied between companies. Depreciation rates were calculated as a percentage of total assets.