[Atanvarno]

Weldon Johnson (letsrun.com) zitiert noch ein paar zusätzliche Details aus den Sunday Times Artikeln

The amount of suspicious tests (this is only for athletes with abnormal blood values indicating possible blood boosting/doping, the experts did nothing to look at steroid usage) by country

Russia 415, Ukraine 102, Morocco 82, Spain 81, Kenya 77, Turkey 52, Greece 42, Belarus 42, Romania 32, Portugal 32, USA 32, Britain 12
[...]
I don't think athletes could be sanctioned for these offenses until 2009 and it says since 2009 70 athletes have had suspicious values and not received the proper scrutiny. That is the part that is alarming to me.

But the good thing it it would mean by the vast majority of these things were before 2009. So since 2009 when athletes [k]new they could get sanctioned the most blatant cheating has stopped.

Quelle

Den zweiten Teil möchte ich nochmal herausheben. Vor Einführung des biologischen Passes (2009), war es nicht möglich, Athleten nur aufgrund der Blutwerte zu sperren, man konnte diese nur zum Anlass nehmen, Zielkontrollen mit herkömmlichen Analysen durchzuführen.
Dass aber seit 2009 immer noch 70 kritische Fälle keine Folgen hatten - das ist ein echter Skandal.

Einem Artikel des Telegraph kann man weitere Details entnehmen

Of the 146 Olympic and World medals won by athletes who recorded suspicious tests, 29 were in the 1500 metres and 28 in the 20 kilometres walk. Other disciplines with a high number of suspicious medals are 800 metres, 5,000 metres, 3,000 metres steeplechase and 10,000 metres.

Quelle

Interessanterweise nicht der Marathonlauf.