I have questions

CrimeReads has begun assembling a list of the 15 Most Adapted Female Crime Writers. Heading the list is obviously Agatha Christie, but I was taken aback by how many of the authors were new to me—I had never even heard of six of them. Also, I have questions about their methodology: I know not everywhere in the world has a thriving film industry, but are there really so few Bollywood films based on crime books by female authors? Chinese, Russian, Korean films? It just seems like a disproportionate number of the non-European authors are Japanese.