What results to display when comparing current and past data?

Working on an analytics dashboard that allows the user to select a recent date range with the option to compare that date range against a previous time period.

Now, let's say they want to see how this week compared with last week. This week, Australia was not in the top locations, but last week it was ranked 4th. Would you expect the UI to retain the current week's results in-tact and just show the changes within those results (like shown below)? Or would you somehow incorporate Australia into the layout? If the latter, any suggestions on doing so? (please disregard the math in the examples)