The percentile is a value between 0 and 100 to 3
decimal places, e.g., 10.000, 99.900, and 99.990.
For example, for a given one-way delay measurement,
if the percentile is set to 95.000 and the 95th percentile
one-way delay is 2 milliseconds, then the 95 percent of
the sample value is less than or equal to 2 milliseconds.