Frequencies for first 10,000 rows of excebld variable in natl1997 dataset :

      Other |
  excessive |
   bleeding |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         23        0.23        0.23
          2 |      9,970       99.70       99.93
          9 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015