Custom Reports

Custom Reports

Trying to run a report that shows all customers that have no activity in the past year. Under standard filters I can chose a number of "last activity time" choices. this is good. Only problem is I cant chose customers that have NO activity. If I leave Activity time as  "custom" and leave it blank, then under "Advanced Filters" contact last activity time "isnt" there are no selections for last year, 120 days, 90 days etc. I have to physically choose dates. 

Cant we please have a report that would help me out???