Michaelia Cash (WA, Liberal Party, Minister for Employment, Skills, Small and Family Business) Share this | Hansard source

In the normal course of events the estimate would be undertaken on the basis of previous data. However, because this is an unprecedented event, any such estimate may not be a correct estimate, so at this point in time it is unable to be undertaken, because the reason for not working is not yet known. So, in the normal course of events—you are right—it would be based on previous data. But because of the nature of the unprecedented event, this has not yet been able to be done.