Same time frame- Last Year

Hello,

I was wondering if anyone would be able to help me. I have two criteria that I want to be updated to do the same thing, but for the SAME TIME PERIOD the previous year.

One is a report that we have scheduled to tell us a count of something for the week previous (So we would need that but time period last year.:

IF ([Business Layer Standard].[Claim_Favorites__c].[Date_of_Loss__c] >_add_days(current_date, -8))
THEN ([Business Layer Standard].[Claim_Favorites__c].[Status_Count__c])
Else (0)


The Other is just a standard, give a me a count reference, but i need it to also put same time period last year. THis one I am unsure if we can do because it does not reference time in general.

[Business Layer Standard].[Claim_Favorites__c].[Status_Count__c]

Any thoughts?