Frequencies for first 10,000 rows of ruletr13 variable in h84 dataset :

  RU LETTER |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      9,564       95.64       95.64
          B |        381        3.81       99.45
          C |         40        0.40       99.85
          D |         12        0.12       99.97
          E |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018