The expected urine output for an adult is 0.5ml/kg/hr. This roughly equates to 30-40ml per hour in an average sized adult.
Interpreting Norm-Referenced Scores Percentile Ranks Percentile ranks, which range from 1 to 99, are commonly used for reporting test results to students and their parents/guardians. You may interpret a percentile as the percentage of students in a norm group whose scores fall below a given student's scale score.
However, it would be nice if the percentile computed from ranking in one direction agreed with the percentile from ranking in the other. You can convert a rank $k$ into a percentile by: Computing $100 k /N$. This value will range from $100/N$ through $100N/N = 100$.