What is your end goal?
If for example you are looking to trend the values you might try putting dates within the columns, DMA's in the rows, and adding a column filter for USA?
If the goal is instead to extract the data (which seems more likely than trying to viz 200+ values in AW), it might be advantageous to use the API or even Data Warehouse.
As an FYI, if you select an individual value, scroll down, press shift, and then select a subsequent value you'll be able to access the entire range. After that you can press ctrl to deselect values within the range.