EBU Single Rulebook Q&A 17 September 2015 2015_2303 Definition of retail deposits with higher outflow rate

What is the definition of the condition for retail deposit with higher outflow rate: "the rate significantly exceeds the average rate for similar retail products"? Bucketing our retail deposits we have a two-fold problem with defining when deposit rate on our product significantly exceeds or does not exceed the average rate for similar retail product.