To find hotel occupancy information based on nationalities and sources, you should use the Production by Nationalities/Sources found in the menu: Front Office → Sales → Operation Statistics
They can be dated at the end of the month and use the monthly accumulated data.
These reports reflect the actual occupancy information based on what is reflected in the room records, not based on what is booked, therefore everything that appears in them is the responsibility of how it has been captured and/or verified by the Front Office users, especially related to the number of people, nationality and source of the guest.