Trend in Employment from Gassy Coal Mines Having Degree II or III Seams in India (1956, 1961, 1966, 1971, 1976, 1981, and 1986 to 2013) | ||||
Years | Gassy Coal Mines | %age | ||
No. of Mines Having Degree II or III or Both II and III Gassy Seams | Employment in Gassy Seam (In ` 000) | Employment in Gassy Seams to Total UG Employment |