Good question. I haven't read it, but the statistics come from this book: https://indianexpress.com/article/lifestyle/books/the-other-one-percent-indians-in-ame

Good question. I haven't read it, but the statistics come from this book: https://indianexpress.com/article/lifestyle/books/the-other-one-percent-indians-in-america-book-review-migration-4419534/ https://indianexpress.com/article/lifestyle/books/the-other-.... They probably outline their methodology.