mamiRna 5p only items length stats

Q1 21.000000
median 21.000000
Q3 22.000000
average 21.037449
min 15.000000
max 25.000000
count 988
total 20785.000000
standard deviation 1.164144

 15  1
 16  2
 17 * 8
 18 ** 17
 19 ***** 38
 20 ********************** 171
 21 ************************************************************ 472
 22 ************************** 202
 23 ******* 52
 24 *** 23
 25  2