To access this feature of IFs, select Extended Features from the Main Menu and then Manage Country Data. Click on Display Processed Country Data.
By clicking on Display Processed Country Data, a window similar to the one below will appear:
This allows you to view all of the data for each country that underlies the use of IFs. By toggling between the options at the top of the screen, Agriculture, Population, Economics, Social/Political and Energy, you are able to quickly find the variables you are looking for. By clicking Exit, your changes will be saved.
If you would like to incorporate data changes into your version of IFs, make any changes necessary and then Rebuild the Model Base and rerun the model.