español al inglés Ciencias Matemáticas y estadística

I'm having trouble understanding how percentile is used in Spanish and particularly in this context. This is a study of the ergonomic properties of a train and they're using people whose height ranks at the top and the bottom of the population to test the driver's cab to make sure that the train can be operated by everyone except maybe very very small people or very very large people. But they use things like 5% percentil and I'm confused by the fact that the 5% only refers to the female population and 95% to the male population; if it were a percentile wouldn't it be of the population as a whole? Anyway, here's what it says the first time it comes up (but it comes up a lot more times too):

Los percentiles de conductores empleados para realizar el presente informe son conforme al documento de referencia "Hanson, L., et al., Swedish anthropometrics for product and work place design, Applied Ergonomics (2008)", siendo estos:
o 95% población sueca masculina, correspondientes a un hombre de 1,92m. de altura.
o 5% población sueca femenina, correspondientes a una mujer de 1,56m. de altura.