Migrant labourers in Kerala
Migrant labourers in Kerala, India's southernmost state, are a significant economic force in the state; there were around 2.5 million internal migrants in Kerala according to a 2013 study by the Gulati Institute of Finance and Taxation. Every year, the migrant worker population in Kerala increases by 2.35 lakh (235,000) people.
Source: Wikipedia — Migrant labourers in Kerala (CC BY-SA 4.0)