It’s now officially been a year since the UFC and the U.S. Anti-Doping Agency teamed up in an attempt to end PED usage in the UFC.

USADA’s website, which is updated weekly with testing stats, reveals some interesting info.

Below is a list of fighters who have given the most samples to USADA:

Holly Holm: (13)
Conor McGregor: (13)
Jose Aldo: (12)
Rafael dos Anjos: (12)
Vitor Belfort: (12)
Anderson Silva: (11)
Ronda Rousey: (10)
Dominick Cruz: (9)
Robbie Lawler: (9)
Johny Hendricks: (9)
Daniel Cormier: (9)
Anthony Johnson: (9)
Junior dos Santos: (9)
Fabricio Werdum: (9)

In addition, USADA has conducted 1,320 tests over the course of the year. While the program has done an excellent job of catching PED users in and out of competition, the number of tests USADA conducted in 2015 is only half of what the agency would like to collect in a calendar year.