- Estimates of Principal Characteristics (2-Digit Level Classification-NIC 2008) under Annual Survey of Industries in Thiruvananthapuram District of Kerala {(NIC : 10, 11, 13, 14 and 16 to 25) (2017-2018)}
- Estimates of Principal Characteristics (2-Digit Level Classification-NIC 2008) under Annual Survey of Industries in Thiruvananthapuram District of Kerala {(NIC : 26 to 28, 30 to 33, 45, 59, 95 and 96) (2017-2018)}