Sample Registration System Statistical Report 2010
The Sample Registration System (SRS) in India is the largest demographic survey in the world covering about 1.5 million households and 7.3 million population. It has continued to be the main source of information on fertility and mortality indicators both at the State and National levels. Apart from the large sample size and geographical spread in most of the Districts, the system has a unique feature of dual recording, which involves collection of data through two different procedures viz., continuous enumeration and retrospective half-yearly surveys.