Там вверху таблички написан написано: No of tourists checked in accomodation units
То есть, как я понимаю, они подсчитывают те самые регистрационные бумажки (C-Form), которые заполняют хозяева жилья при поселении гостей.
upd. Нашел дополнительно разъяснение на этот счет:
With the government able to calculate the numbers of foreign tourists through charter arrivals and scheduled flights statistics, how does Goa calculate the number of domestic tourists that it receives?
“Every hotel or guest house has to submit a form to the department of tourism at the end of the month. The form must contain details such as the number of rooms and number of beds which are available, and its occupancy by tourists during the month,” a tourism department official said. The form also contains details on whether the guests were Indians, Goans or foreigners.