Id say about 75% (estimate) and 100% of the top. The drug "testing" is a joke for strongman sports, most of the guys that i know use very conservative amounts, such as 500 mg sust a week + 200 mg deca a week, dianabol is also very popular. My friend was a badmington player and one of hes best friends was a top competitor and he told that this guy use massive amounts of EPO, which a think is insane.
BTW don´t ask me any names, i won´t give you any, esp. any of my countrymens...
You´re welcome...