Add link to Cloudflare Radar

Co-authored-by: Luke Valenta <[email protected]>

Author: RebeccaTamachiro

src/content/docs/ssl/post-quantum-cryptography/index.mdx

@@ -71,7 +71,7 @@ flowchart LR
 
 ### 1. Visitor to Cloudflare
 
-As of [October 2022](https://blog.cloudflare.com/post-quantum-for-all/), all websites and APIs served through Cloudflare over TLS 1.3 support post-quantum hybrid key agreement. However, the connection is only post-quantum secured if the client also supports PQC.
+As of [October 2022](https://blog.cloudflare.com/post-quantum-for-all/), all websites and APIs served through Cloudflare over TLS 1.3 support post-quantum hybrid key agreement. However, the connection is only post-quantum secured if the client also supports PQC. See [Cloudflare Radar](https://radar.cloudflare.com/adoption-and-usage#post-quantum-encryption-adoption) for current statistics on PQ encryption adoption in requests to Cloudflare.
 
 Refer to [Post-quantum cryptography support](/ssl/post-quantum-cryptography/pqc-support/) for a list of browsers and other clients that are compatible with hybrid key agreements.