Via: Naked Capitalism
And as far as how many oligarchs have deposits there, even the New York Times, in a story framed around a lawyer who sets up shell companies for Russian investors, mentions in passing at the end:
Any dirty money flowing through Cyprus, however, is dwarfed by funds generated by legitimate businesses looking for easy and legal ways to avoid taxes. There are so many Russian companies registered in Cyprus for tax reasons that the tiny country now ranks as Russia’s biggest source of direct foreign investment, most of it from Russian nationals through vehicles registered in Cyprus.
Read more: here