This is based on 2019 pre covid. It is possible with the influx of more foreigners from different countries, the number now is far above the 300000.
Or maybe you are only considering those who are western. But nonetheless, the extra influx of people still contribute to the country and its GDP. Which is what Mike Lister mentioned in one of his posts, regarding GDP.
But even so, even back in 2019, I would have thought the number to be higher.
Quite surprising.