You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is National Family Health Survey has successfully completed:- and explain in detail?
National Family Health Survey (NFHS) is conducted once in every 5-6 years by International institute of population sciences (IIPS), Mumbai. 1st conducted in 1992-93, 2nd 1998-99, 3rd 2005-06, 4th 2015-16. Four rounds of National Family Health Survey have been conducted so far.