This repo contains a whitepaper about the Anonymity Sets of Privacy coins, in particular of Zcash Protocol coins, where they are often called Shielded Pools.
This is a graph of the anonset size of HUSH v3 mainnet during it's first 579000 blocks. Currently it is at a value of 485027 @ Block 579014. The latest data can be found at https://explorer.hush.land
This is a graph of the anonset size of HUSH v3 mainnet during it's first 968000 blocks. Currently it is at a value of 1026194 @ Block 968810. The latest data can be found at https://explorer.hush.land