We have the numerator (1), but what is the denominator? The statistic is almost meaningless without the denominator. If we have 1 deportation for this every 6 months, and we have 100,000 entries, then we have 0.001% deportations. You can adjust the denominator as necessary to get the statistic you want. For example, if we know 1000 "permatourists" enter every 6 months, and 1 is deported, then we have 0.1% deportations of permatourists. But I doubt this last number is published.