As you tune into this year’s Winter Olympics in Pyeongchang County, South Korea, you’ll probably notice that a significant country’s flag is missing. Once again, Russia has been caught using performance-enhancing drugs, commonly known as doping.

The country is banned from participating in the 2018 games, but athletes who can prove that they haven’t used performance-enhancing drugs are able to compete under the title of an “Olympic Athlete from Russia.” Any medals won by Russian athletes during this Olympics will belong to the athlete, and will not go to Russia.

This isn’t the first time Russia has faced the consequences for doping. A total of 129 Russian Athletes have been caught over the years for cheating by using illegal performance enhancers, which resulted in 51 medals being stripped. This number is more than any other country, four times the number of the runner up and more than a third of the global total.

One of the reasons Russia is constantly accused of doping despite global efforts to stop it, is because it’s not just the athletes as individuals who choose to use the drugs, but a state-backed program who encourages the use of the drugs. The country has even gone so far as to send KGB officers to pose as anti-doping authorities from the International Olympic Committee to tamper doping tests and protect the Russian athletes from disqualification.

The snowy country is infamous for enhancers, and can’t seem to quit them despite the establishment of the Russian Anti-Doping Agency (RUSADA) in 2008. The agency refused to follow the anti-doping code set by the World Anti-Doping Agency (WADA). Due to its inefficiency, RUSADA was declared non compliant and will not be reinstated as decided during a WADA Foundation Board meeting in Seoul on Nov. 16. Despite the public knowledge of doping and continuous investigations, Russian officials continue to deny any usage of performance enhancers.