As of my last update, Assam produced around 680-700 million kilograms of tea annually.1
References
1Sharma D, Salma U. A study on the contribution of tea industry towards the economic development of Assam. Madhya Bharti: Humanities and Social Sciences. 2023;83(8):129-138. https://www.khagarijancollege.co.in/upload/publication_scopus/1693363642.pdf