Frequencies for first 10,000 rows of uterine variable in natl2000 dataset :

    Uterine |
   bleeding |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         54        0.54        0.54
          2 |      9,946       99.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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