在二战后，几遭毁灭的欧洲执行了严苛的外汇管制，但平均下来流出的非法资本经常会占到贸易总额的10%或更多。
After World War II, when a ruined Europe was smothered in foreign-exchange controls, illegal capital flows out of the continent often averaged 10% of the value of trade or more.