Do you have any data on that?
Yes I do.
I present, India.
Why you need data when evidence is in plain sight?
India is now more than 1500 Million people now. When I left India in 1960, it was 1/3rd that size. As for food being spicy, any dude who has traveled to India knows it first-hand.
Stop wasting time on useless studies done by PhD students and professors funded to do useless research.