Just wondering if you have any sources to support the claim. I've been under the impression that dynamic languages have had the lion's share of back-end web dev

Just wondering if you have any sources to support the claim. I've been under the impression that dynamic languages have had the lion's share of back-end web development for a considerable span of time - from PHP to Rails to Django/Flask to Node. .NET is a blip by comparison, JSP/Spring isn't even that. Perhaps just a case of different perspectives?